Airworthiness Directive · Amendment 39-14062 · Boeing Model 737-600, -700, and -800 Series Airplanes
Boeing Model 737-600, -700, and -800 Series Airplanes
This AD applies to Boeing Model 737-600, -700, and -800 series airplanes, as identified in Boeing Special Attention Service Bulletin 737-54-1040, Revision 1, dated August 14, 2003; certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 737-600, -700, and -800 series airplanes. This AD requires doing a general visual inspection for sealant at the interface of the upper spar fittings, strut side skins, and the fittings of the thrust reverser strut fairing on the engine struts; and applying an injection seal or silicone sponge rubber with fillet seal if necessary. This AD is prompted by a report that an injection seal in the engine strut area may not have been properly completed or installed during production. We are issuing this AD to prevent flammable fluid (such as fuel or hydraulic fluid) from leaking onto a hot engine exhaust nozzle or into the engine core fire zone, and consequently causing an uncontrolled fire or explosion.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 18 months or 3,500 flight cycles after the effective date of this AD, whichever occurs first: Do a general visual inspection for sealant at the interface of the upper spar fittings, strut side skins, and the fittings of the thrust reverser strut fairing on the engine struts, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-54-1040, dated November 14, 2002; or Revision 1, dated August 14, 2003.
(1) If the injection seal is found to properly seal the entire gap, no further action is required by this AD.
(2) If the injection seal is not found to properly seal the entire gap or if the injection seal is found to be missing, before further flight, apply an injection seal or silicone sponge rubber with fillet seal in accordance with the Accomplishment Instructions of the service bulletin.
