Airworthiness Directive · Amendment 39-22096 · Equipment/furnishings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes, certificated in any category, identified as Group 1, Configuration 4; Group 2, 3, 12, and 13, Configuration 3; Group 14, Configuration 1 and 3; Group 15, Configuration 2; and Group 17, Configuration 3 and 4; in Boeing Special Attention Service Bulletin 767-25-0381, Revision 4, dated April 26, 2021.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes. This AD was prompted by reports of burned Boeing Material Specification (BMS) 8-39 urethane foam, which is a material with fire-retardant properties that deteriorate with age. This AD requires replacing certain BMS 8-39 foam pads with Nomex felt in certain areas, removing certain BMS 8-39 foam pads in a certain area (which includes a general visual inspection to find BMS 8-39 foam pads), and inspecting the corner seals to determine if the corner seals were replaced, and replacing affected corner seals. This AD also prohibits the installation of BMS 8-39 urethane foam seal in certain locations. The FAA is issuing this AD to address the unsafe condition on these products.
Within 72 months after the effective date of this AD, do the applicable actions specified in paragraph (g)(1), (2), (3), or (4) of this AD in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 767-25-0381, Revision 4, dated April 26, 2021.
(1) For Group 1, Configuration 4, airplanes; and Group 2, 3, 12, and 13, Configuration 3, airplanes: Replace BMS 8-39 foam pads in the forward and aft crown area with Nomex felt.
(2) For Group 14, Configuration 1 and 3, airplanes; and Group 15, Configuration 2, airplanes: Remove BMS 8-39 foam pads in the crown area.
(3) For Group 17, Configuration 3, airplanes: Replace BMS 8-39 foam pads in the forward and aft crown area with Nomex felt, inspect the corner seals to determine if the corner seals were replaced and if any corner seals were not replaced, within 72 months after the effective date of this AD, replace affected corner seals.
(4) For Group 17, Configuration 4, airplanes: Inspect the corner seals to determine if the corner seals were replaced and if any corner seals were not replaced, within 72 months after the effective date of this AD, replace affected corner seals.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
