81 FR 92740 - Airworthiness Directives; The Boeing Company Airplanes
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration Federal Register Volume 81, Issue 244 (December 20, 2016)
Federal Aviation Administration
Federal Register Volume 81, Issue 244 (December 20, 2016)
| Page Range | 92740-92742 | |
| FR Document | 2016-30026 |
[Federal Register Volume 81, Number 244 (Tuesday, December 20, 2016)] [Proposed Rules] [Pages 92740-92742] From the Federal Register Online [www.thefederalregister.org] [FR Doc No: 2016-30026] ======================================================================= ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2016-9501; Directorate Identifier 2016-NM-137-AD] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). ----------------------------------------------------------------------- SUMMARY: We propose to adopt a new airworthiness directive (AD) for The Boeing Company Model 777 airplanes. This proposed AD was prompted by reports of uncommanded altitude display changes in the mode control panel (MCP) altitude window. This proposed AD would require replacing the existing MCP with a new MCP having a different part number. We are proposing this AD to address the unsafe condition on these products. DATES: We must receive comments on this proposed AD by February 3, 2017. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods:Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments. Fax: 202-493-2251. Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590. Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this NPRM, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone: 206-544-5000, extension 1; fax: 206-766-5680; Internet: https://www.myboeingfleet.com. You may view [[Page 92741]] this referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221. It is also available on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2016-9501. Examining the AD Docket You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2016- 9501; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (phone: 800-647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Frank Carreras, Aerospace Engineer, Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, WA 98057- 3356; phone: 425-917-6442; fax: 425-917-6590; email: [email protected]. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ``Docket No. FAA-2016-9501; Directorate Identifier 2016-NM-137-AD'' at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments. We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion We have received reports of uncommanded altitude display changes in the MCP altitude window. Most of the reports indicated that the altitude changes occurred in whole increments of 100 feet or 1,000 feet, with a general range of between 1,000 and 2,000 feet (the largest reported change was 12,000 feet). Boeing has also received reports of uncommanded changes in the MCP's speed/mach window. Uncommanded changes to the MCP selected altitude could result in incorrect spatial separation between airplanes, midair collision, or controlled flight into terrain. Related Service Information Under 1 CFR Part 51 We reviewed Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016. The service information describes procedures for replacing the existing MCP with a new MCP having a different part number, in the glareshield in the flight compartment. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. FAA's Determination We are proposing this AD because we evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Proposed AD Requirements This proposed AD would require accomplishing the actions specified in the service information described previously, except as discussed under ``Differences Between this Proposed AD and the Service Information.'' For information on the procedures and compliance times, see this service information at http://www.regulations.gov by searching for and locating Docket No. FAA-2016-9501. Differences Between This Proposed AD and the Service Information Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016, specifies the compliance time as 1,875 days. For this proposed AD, we specified a compliance time of 60 months. Costs of Compliance We estimate that this proposed AD affects 203 airplanes of U.S. registry. We estimate the following costs to comply with this proposed AD: Estimated Costs ---------------------------------------------------------------------------------------------------------------- Cost on U.S. Action Labor cost Parts cost Cost per product operators ---------------------------------------------------------------------------------------------------------------- Replacement..................... 2 work-hours x $85 1 Up to $5,800.... Up to $5,970...... Up to $1,211,910 per hour = $170. ---------------------------------------------------------------------------------------------------------------- \1\ We have received no definitive data regarding the cost of the new MCP part number. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII: Aviation Programs, describes in more detail the scope of the Agency's authority. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: ``General requirements.'' Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this proposed regulation: (1) Is not a ``significant regulatory action'' under Executive Order 12866, (2) Is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), [[Page 92742]] (3) Will not affect intrastate aviation in Alaska, and (4) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): The Boeing Company; Docket No. FAA-2016-9501; Directorate Identifier 2016-NM-137-AD. (a) Comments Due Date We must receive comments by February 3, 2017. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 777-200, -200LR, - 300, -300ER, and 777F series airplanes, certificated in any category, identified in Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016. (d) Subject Air Transport Association (ATA) of America Code 22, Auto flight. (e) Unsafe Condition This AD was prompted by reports of uncommanded altitude display changes in the mode control panel (MCP) altitude window. We are issuing this AD to prevent uncommanded changes to the MCP selected altitude; such uncommanded changes could result in incorrect spatial separation between airplanes, midair collision, or controlled flight into terrain. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Replacement of MCP Within 60 months after the effective date of this AD: Replace the existing MCP with a new MCP having a different part number, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-22-0034, dated March 3, 2016. (h) Alternative Methods of Compliance (AMOCs) (1) The Manager, Seattle Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO, send it to the attention of the person identified in paragraph (i)(1) of this AD. Information may be emailed to: [email protected]. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) that has been authorized by the Manager, Seattle ACO, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. (4) For service information that contains steps that are labeled as Required for Compliance (RC), the provisions of paragraphs (h)(4)(i) and (h)(4)(ii) of this AD apply. (i) The steps labeled as RC, including substeps under an RC step and any figures identified in an RC step, must be done to comply with the AD. If a step or substep is labeled ``RC Exempt,'' then the RC requirement is removed from that step or substep. An AMOC is required for any deviations to RC steps, including substeps and identified figures. (ii) Steps not labeled as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the RC steps, including substeps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition. (i) Related Information (1) For more information about this AD, contact Frank Carreras, Aerospace Engineer, Systems and Equipment Branch, ANM-130S, FAA, Seattle ACO, 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: 425-917-6442; fax: 425-917-6590; email: [email protected]. (2) For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone: 206-544- 5000, extension 1; fax: 206-766-5680; Internet: https://www.myboeingfleet.com. You may view this referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221. Issued in Renton, Washington, on December 2, 2016. Michael Kaszycki, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2016-30026 Filed 12-19-16; 8:45 am] BILLING CODE 4910-13-P
![92740 Federal Register / Vol. 81, No. 244 / Tuesday, December 20, 2016 / Proposed Rules
administrative procedures that must be PART 201—Regulations Under the deceptive or gives an undue or
exhausted prior to any judicial Packers and Stockyards Act unreasonable preference or advantage to
challenge to the provisions of this any poultry grower or subjects any
proposed rule. Nothing in this proposed ■ 1. The authority citation for Part 201 poultry grower to an undue or
rule is intended to interfere with a continues to read as follows: unreasonable prejudice or disadvantage.
person’s right to enforce liability against Authority: 7 U.S.C. 181–229c. Larry Mitchell,
any person subject to the P&S Act under ■ 2. Amend § 201.210 by adding Administrator, Grain Inspection, Packers and
authority granted in section 308 of the paragraph (b)(10) to read as follows: Stockyards Administration.
P&S Act.
* * * * * [FR Doc. 2016–30429 Filed 12–19–16; 8:45 am]
Executive Order 13175 (b) * * * BILLING CODE 3410–KD–P
(10) Failing to use a poultry grower
This proposed rule has been reviewed ranking system in a fair manner after
in accordance with the requirements of applying the criteria in § 201.214. DEPARTMENT OF TRANSPORTATION
Executive Order 13175, ‘‘Consultation ■ 2. Add new § 201.214 to read as
and Coordination with Indian Tribal follows: Federal Aviation Administration
Governments.’’ Executive Order 13175
requires Federal agencies to consult and § 201.214 Poultry grower ranking systems. 14 CFR Part 39
coordinate with tribes on a government- The Secretary may consider various
[Docket No. FAA–2016–9501; Directorate
to-government basis on policies that criteria when determining whether a Identifier 2016–NM–137–AD]
have tribal implications, including live poultry dealer has engaged in a
regulations, legislative comments or pattern or practice to use a poultry RIN 2120–AA64
proposed legislation, and other policy grower ranking system to compensate
statements or actions that have poultry growers in an unfair, unjustly Airworthiness Directives; The Boeing
substantial direct effects on one or more discriminatory, or deceptive manner, or Company Airplanes
Indian tribes, on the relationship in a way that gives an undue or AGENCY: Federal Aviation
between the Federal Government and unreasonable preference or advantage to Administration (FAA), DOT.
Indian tribes or on the distribution of any poultry grower or subjects any ACTION: Notice of proposed rulemaking
power and responsibilities between the poultry grower to an undue or (NPRM).
Federal Government and Indian tribes. unreasonable prejudice or disadvantage.
GIPSA has assessed the impact of this These criteria include, but are not SUMMARY: We propose to adopt a new
rule on Indian tribes and determined limited to: airworthiness directive (AD) for The
that this rule does not, to our (a) Whether a live poultry dealer Boeing Company Model 777 airplanes.
knowledge, have tribal implications that provides sufficient information to This proposed AD was prompted by
require tribal consultation under EO enable a poultry grower to make reports of uncommanded altitude
13175. If a tribe requests consultation, informed business decisions. Such display changes in the mode control
GIPSA will work with the Office of information should include the panel (MCP) altitude window. This
Tribal Relations to ensure meaningful anticipated number of flocks per year, proposed AD would require replacing
consultation is provided where changes, the average gross income from each the existing MCP with a new MCP
additions, and modifications identified flock, and any other information having a different part number. We are
herein are not expressly mandated by necessary to enable a poultry grower to proposing this AD to address the unsafe
Congress. calculate the expected income from the condition on these products.
poultry growing arrangement; DATES: We must receive comments on
Paperwork Reduction Act (b) Whether a live poultry dealer this proposed AD by February 3, 2017.
supplies inputs of comparable quality ADDRESSES: You may send comments,
This proposed rule does not contain and quantity to all poultry growers in using the procedures found in 14 CFR
new or amended information collection the ranking group; and whether there is 11.43 and 11.45, by any of the following
requirements subject to the Paperwork a pattern or practice of supplying methods:
Reduction Act of 1995 (44 U.S.C. 3501 inferior inputs to one or more poultry • Federal eRulemaking Portal: Go to
et seq.). It does not involve collection of growers in the ranking group. Inputs http://www.regulations.gov. Follow the
new or additional information by the include birds, feed, medication, and any instructions for submitting comments.
federal government. other input supplied by the live poultry • Fax: 202–493–2251.
E-Government Act Compliance dealer; • Mail: U.S. Department of
(c) Whether a live poultry dealer Transportation, Docket Operations, M–
GIPSA is committed to compliance includes poultry growers provided with 30, West Building Ground Floor, Room
with the E-Government Act, to promote dissimilar production variables in the W12–140, 1200 New Jersey Avenue SE.,
the use of the Internet and other ranking group in a manner that affects Washington, DC 20590.
information technologies to provide a poultry grower’s compensation. • Hand Delivery: Deliver to Mail
increased opportunities for citizen Production variables include, but are address above between 9 a.m. and 5
access to Government information and not limited to, the density at which the p.m., Monday through Friday, except
services, and for other purposes. live poultry dealer places birds, the Federal holidays.
mstockstill on DSK3G9T082PROD with PROPOSALS
target slaughter weights of the birds, and For service information identified in
List of Subjects in 9 CFR Part 201 bird ages that vary by more than seven this NPRM, contact Boeing Commercial
days; and Airplanes, Attention: Data & Services
Contracts, Poultry, Livestock, Trade
(d) Whether a live poultry dealer has Management, P.O. Box 3707, MC 2H–65,
Practices.
demonstrated a legitimate business Seattle, WA 98124–2207; telephone:
For the reasons set forth in the justification for use of a poultry grower 206–544–5000, extension 1; fax: 206–
preamble, we propose to amend 9 CFR ranking system that may otherwise be 766–5680; Internet: https://
part 201 to read as follows: unfair, unjustly discriminatory, or www.myboeingfleet.com. You may view
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![92742 Federal Register / Vol. 81, No. 244 / Tuesday, December 20, 2016 / Proposed Rules
(3) Will not affect intrastate aviation Instructions of Boeing Special Attention Directorate, 1601 Lind Avenue SW., Renton,
in Alaska, and Service Bulletin 777–22–0034, dated March WA. For information on the availability of
(4) Will not have a significant 3, 2016. this material at the FAA, call 425–227–1221.
economic impact, positive or negative, (h) Alternative Methods of Compliance Issued in Renton, Washington, on
on a substantial number of small entities (AMOCs) December 2, 2016.
under the criteria of the Regulatory (1) The Manager, Seattle Aircraft Michael Kaszycki,
Flexibility Act. Certification Office (ACO), FAA, has the Acting Manager, Transport Airplane
authority to approve AMOCs for this AD, if Directorate, Aircraft Certification Service.
List of Subjects in 14 CFR Part 39
requested using the procedures found in 14 [FR Doc. 2016–30026 Filed 12–19–16; 8:45 am]
Air transportation, Aircraft, Aviation CFR 39.19. In accordance with 14 CFR 39.19,
BILLING CODE 4910–13–P
safety, Incorporation by reference, send your request to your principal inspector
Safety. or local Flight Standards District Office, as
appropriate. If sending information directly
The Proposed Amendment to the manager of the ACO, send it to the DEPARTMENT OF TRANSPORTATION
Accordingly, under the authority attention of the person identified in
paragraph (i)(1) of this AD. Information may Federal Aviation Administration
delegated to me by the Administrator,
be emailed to: 9-ANM-Seattle-ACO-AMOC-
the FAA proposes to amend 14 CFR part 14 CFR Part 39
Requests@faa.gov.
39 as follows: (2) Before using any approved AMOC, [Docket No. FAA–2016–9502; Directorate
notify your appropriate principal inspector, Identifier 2016–NM–128–AD]
PART 39—AIRWORTHINESS or lacking a principal inspector, the manager
DIRECTIVES of the local flight standards district office/ RIN 2120–AA64
certificate holding district office.
■ 1. The authority citation for part 39 (3) An AMOC that provides an acceptable Airworthiness Directives; The Boeing
continues to read as follows: level of safety may be used for any repair, Company Airplanes
Authority: 49 U.S.C. 106(g), 40113, 44701. modification, or alteration required by this
AD if it is approved by the Boeing AGENCY: Federal Aviation
§ 39.13 [Amended] Commercial Airplanes Organization Administration (FAA), DOT.
■ 2. The FAA amends § 39.13 by adding Designation Authorization (ODA) that has ACTION: Notice of proposed rulemaking
the following new airworthiness been authorized by the Manager, Seattle (NPRM).
directive (AD): ACO, to make those findings. To be
approved, the repair method, modification SUMMARY: We propose to adopt a new
The Boeing Company; Docket No. FAA– deviation, or alteration deviation must meet
2016–9501; Directorate Identifier 2016– airworthiness directive (AD) for certain
the certification basis of the airplane, and the
NM–137–AD. approval must specifically refer to this AD.
The Boeing Company Model 757–200
(4) For service information that contains and –200PF series airplanes. This
(a) Comments Due Date proposed AD was prompted by an
steps that are labeled as Required for
We must receive comments by February 3, Compliance (RC), the provisions of evaluation by the design approval
2017. paragraphs (h)(4)(i) and (h)(4)(ii) of this AD holder (DAH) indicating that certain
(b) Affected ADs apply. areas of the frame webs are subject to
(i) The steps labeled as RC, including widespread fatigue damage (WFD). This
None.
substeps under an RC step and any figures proposed AD would require high
(c) Applicability identified in an RC step, must be done to frequency eddy current (HFEC)
This AD applies to The Boeing Company comply with the AD. If a step or substep is
labeled ‘‘RC Exempt,’’ then the RC
inspections of the frame webs for any
Model 777–200, –200LR, –300, –300ER, and open coordinating holes, tooling holes,
777F series airplanes, certificated in any requirement is removed from that step or
substep. An AMOC is required for any and insulation blanket attachment
category, identified in Boeing Special
Attention Service Bulletin 777–22–0034, deviations to RC steps, including substeps holes; repair if necessary; and
dated March 3, 2016. and identified figures. modification of the frame webs at all
(ii) Steps not labeled as RC may be open hole locations, which would
(d) Subject deviated from using accepted methods in terminate the repetitive inspections. We
Air Transport Association (ATA) of accordance with the operator’s maintenance are proposing this AD to address the
America Code 22, Auto flight. or inspection program without obtaining unsafe condition on these products.
approval of an AMOC, provided the RC steps,
(e) Unsafe Condition including substeps and identified figures, can DATES: We must receive comments on
This AD was prompted by reports of still be done as specified, and the airplane this proposed AD by February 3, 2017.
uncommanded altitude display changes in can be put back in an airworthy condition. ADDRESSES: You may send comments,
the mode control panel (MCP) altitude using the procedures found in 14 CFR
(i) Related Information
window. We are issuing this AD to prevent 11.43 and 11.45, by any of the following
uncommanded changes to the MCP selected (1) For more information about this AD,
contact Frank Carreras, Aerospace Engineer, methods:
altitude; such uncommanded changes could
Systems and Equipment Branch, ANM–130S, • Federal eRulemaking Portal: Go to
result in incorrect spatial separation between
airplanes, midair collision, or controlled FAA, Seattle ACO, 1601 Lind Avenue SW., http://www.regulations.gov. Follow the
flight into terrain. Renton, WA 98057–3356; phone: 425–917– instructions for submitting comments.
6442; fax: 425–917–6590; email: • Fax: 202–493–2251.
(f) Compliance frank.carreras@faa.gov. • Mail: U.S. Department of
mstockstill on DSK3G9T082PROD with PROPOSALS
Comply with this AD within the (2) For service information identified in Transportation, Docket Operations, M–
compliance times specified, unless already this AD, contact Boeing Commercial 30, West Building Ground Floor, Room
done. Airplanes, Attention: Data & Services
W12–140, 1200 New Jersey Avenue SE.,
Management, P.O. Box 3707, MC 2H–65,
(g) Replacement of MCP Seattle, WA 98124–2207; telephone: 206– Washington, DC 20590.
Within 60 months after the effective date 544–5000, extension 1; fax: 206–766–5680; • Hand Delivery: Deliver to Mail
of this AD: Replace the existing MCP with a Internet: https://www.myboeingfleet.com. address above between 9 a.m. and 5
new MCP having a different part number, in You may view this referenced service p.m., Monday through Friday, except
accordance with the Accomplishment information at the FAA, Transport Airplane Federal holidays.
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Document Created: 2018-02-14 09:09:38
Document Modified: 2018-02-14 09:09:38
| Category | Regulatory Information | |
| Collection | Federal Register | |
| sudoc Class | AE 2.7: GS 4.107: AE 2.106: | |
| Publisher | Office of the Federal Register, National Archives and Records Administration | |
| Section | Proposed Rules | |
| Action | Notice of proposed rulemaking (NPRM). | |
| Dates | We must receive comments on this proposed AD by February 3, 2017. | |
| Contact | Frank Carreras, Aerospace Engineer, Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, WA 98057- 3356; phone: 425-917-6442; fax: 425-917-6590; email: [email protected] | |
| FR Citation | 81 FR 92740 | |
| RIN Number | 2120-AA64 | |
| CFR Associated | Air Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety |
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