Airworthiness directives › 2022-13-10
AD 2022-13-10 Airworthiness Directives; The Boeing Company Airplanes
Models named: 767-200, -300, -300F, -400ER series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
Unsafe condition
This AD was prompted by reports of burned Boeing Material Specification (BMS) 8-39 urethane foam, and a report from the airplane manufacturer that airplanes were assembled with seals throughout various areas of the airplane (including flight deck and cargo compartments) made of BMS 8-39 urethane foam, a material with fire-retardant properties that deteriorate with age. The FAA is issuing this AD to address degraded BMS 8-39 urethane foam used in seals, which may fail to maintain sufficient halon concentrations in the cargo compartments to extinguish or contain fire or smoke, and may result in penetration of smoke or fire into the flight compartment, leading to possible loss of control of the airplane.
Affected ADs
None.
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