Airworthiness Directive · Amendment 39-21209 · Equipment/furnishings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 737-300, -400, and -500 series airplanes, certificated in any category, as identified in the service information specified in paragraphs (c)(1) and (2) of this AD.
(1) Boeing Special Attention Service Bulletin 737-25-1728, Revision 1, dated November 26, 2019.
(2) Boeing Requirements Bulletin 737-25-1758 RB, dated November 8, 2017.
The FAA is superseding Airworthiness Directive (AD) 2019-03- 06, which applied to certain The Boeing Company Model 737-300, -400, and -500 series airplanes. AD 2019-03-06 required installing lanyard assemblies on the passenger service units (PSUs) and, for certain airplanes, on the life vest panels. This AD was prompted by a report indicating that the PSUs became separated from their attachments during several survivable accident sequences, and by the determination that additional actions are necessary for five airplanes. This AD retains the requirements of AD 2019-03-06 and also requires installation of lanyard assemblies on the life vest panels on those five airplanes. The FAA is issuing this AD to address the unsafe condition on these products.
(1) For airplanes identified in Boeing Special Attention Service Bulletin 737-25-1728, Revision 1, dated November 26, 2019: At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Special Attention Service Bulletin 737-25-1728, Revision 1, dated November 26, 2019, do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-25-1728, Revision 1, dated November 26, 2019.
(2) For airplanes identified in Boeing Requirements Bulletin 737-25-1758 RB, dated November 8, 2017: Except as required by paragraph (h) of this AD, at the applicable times specified in the “Compliance” paragraph of Boeing Requirements Bulletin 737-25-1758 RB, dated November 8, 2017, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Requirements Bulletin 737-25-1758 RB, dated November 8, 2017.
Note 1 to paragraph (g)(2): Guidance for accomplishing the actions required by paragraph (g)(2) of this AD can be found in Boeing Service Bulletin 737-25-1758, dated November 8, 2017, which is referred to in Boeing Requirements Bulletin 737-25-1758 RB, dated November 8, 2017.
Where Boeing Requirements Bulletin 737-25-1758 RB, dated November 8, 2017, uses the phrase “the original issue date of the Requirements Bulletin (RB),” this AD requires using March 29, 2019 (the effective date of AD 2019-03-06).
