Airworthiness Directive · Amendment 39-21598 · 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, as identified in Boeing Special Attention Service Bulletin 767-25-0550, Revision 1, dated December 4, 2019.
The FAA is superseding Airworthiness Directive (AD) 2016-25- 29, which applied to certain The Boeing Company Model 767-200 and -300 series airplanes. AD 2016-25-29 required replacing the cargo compartment insulation blankets on the left and right sides with new insulation blankets that incorporate fire stops. This AD was prompted by a report of a fire in the bilge area of the cargo compartment that burned through the insulation blankets that were intended to prevent smoke from migrating behind the cargo compartment sidewall liners and upward into the main cabin. This AD continues to require the actions in AD 2016-25-29 for certain airplanes. This AD also adds airplanes to the applicability and requires a general visual inspection of the replacement insulation blankets to determine if the blankets are in serviceable condition and correctly installed, and applicable on- condition actions. For certain airplanes, this AD also requires an inspection to determine the insulation blanket part number installed; replacement of additional insulation blankets; and applicable on- condition actions. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified by paragraph (h) of this AD: At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Special Attention Service Bulletin 767-25-0550, Revision 1, dated December 4, 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 767-25-0550, Revision 1, dated December 4, 2019.
(1) Where Boeing Special Attention Service Bulletin 767-25-0550, Revision 1, dated December 4, 2019, uses the phrase “the Revision 1 date of this service bulletin,” this AD requires using “the effective date of this AD.”
(2) Where Figure 42-A of Boeing Special Attention Service Bulletin 767-25-0550, Revision 1, dated December 4, 2019, identifies item 4 between stations 434 through 456, the correct item between stations 434 through 456 is item 3.
(3) Figures 49, 50, and 51 of Boeing Special Attention Service Bulletin 767-25-0550, Revision 1, dated December 4, 2019, are missing the depiction of an insulation blanket, and an installation blanket must be installed between station (STA) 1395 and 1417.
(4) The part numbers for the insulation blankets specified in Boeing Special Attention Service Bulletin 767-25-0550, dated January 15, 2015, and Boeing Special Attention Service Bulletin 767-25-0550, Revision 1, dated December 4, 2019, are acceptable for installation; the new part numbers specified in Boeing Special Attention Service Bulletin 767-25-0550, Revision 1, dated December 4, 2019, require less work to install.
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
