Airworthiness Directive · Amendment 39-21876 · Equipment/furnishings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes, certificated in any category, without a Boeing Sky Interior (BSI).
The FAA is superseding Airworthiness Directive (AD) 2019-03- 26, which applied to certain The Boeing Company Model 737-600, -700, - 700C, -800, -900, and -900ER series airplanes. AD 2019-03-26 required modifying the passenger service units (PSUs) and life vest panels by replacing the existing inboard lanyard and installing two new lanyards on the outboard edge of the PSUs and life vest panels; measuring the distance between the hooks of the torsion spring of the lanyard assembly; replacing discrepant lanyard assemblies; and re-identifying serviceable lanyard assemblies. This AD was prompted by a determination that certain airplanes are listed in the wrong configuration and certain PSUs have not been correctly re-identified. This AD retains the requirements of AD 2019-03-26, and, for certain airplanes, requires an inspection to determine if the re-identified PSU part number is correct, and further re-identification if necessary. The FAA is issuing this AD to address the unsafe condition on these products.
Within 60 months after April 8, 2019 (the effective date of AD 2019-03-26), do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-25-1707, Revision 2, dated July 27, 2020.
As of the applicable time specified in paragraph (h)(1) or (2) of this AD, no person may install on any airplane a PSU or life vest panel, unless the lanyard assembly has been modified (secondary retention features added) or re-identified, as applicable, as required by paragraph (g) of this AD.
(1) For airplanes that have PSUs or life vest panels without the secondary retention features installed: After modification or re-identification, as applicable, of the airplane as required by paragraph (g) of this AD.
(2) For airplanes that have PSUs or life vest panels with the secondary retention features installed: As of the effective date of this AD.
