Airworthiness Directives; The Boeing Company Airplanes

We are revising an earlier notice of proposed rulemaking (NPRM), which applies to all The Boeing Company Model 747-100, 747- 100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes. This action revises the NPRM by adding a reporting requirement. We are proposing this airworthiness directive (AD) to address the unsafe condition on these products. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these changes.