Airworthiness Directive 2003-16-06
one-timeAirworthiness Directives; Boeing Model 747 Series Airplanes Equipped with General Electric CF6-45 or CF6-50 Series Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD), applicable to all Boeing Model 747 series airplanes equipped with General Electric CF6-45 and CF6-50 series engines. This amendment requires an inspection to detect chafing of the fuel line or incorrect clearance between the fuel line and pneumatic duct insulation blanket; a fuel leak check and strut drain test; corrective action if necessary; replacement of the outboard strut fuel line coupling O-rings and retaining rings with new parts; replacement of the pneumatic duct boot with a new part; and, for certain airplanes, installation of a flame arrestor and drain line entry screens. The actions specified by this AD are intended to prevent leaking fuel line couplings, chafed fuel lines, restricted or clogged strut drain lines, migrating fluids or vapors toward ignition sources, and flashback of external flame into the strut; these conditions could result in an uncontained engine strut fire. This action is intended to address the identified unsafe condition.
Which aircraft AD 2003-16-06 applies to
Specific 747 series/variant not stated in retrieved applicability text; addresses fuel line chafing and clearance near the strut per Boeing Service Bulletin 747-36-2111 (dated Feb 20, 1992) and fuel tube replacement per Boeing Service Bulletin 747-28-2162 (dated July 30, 1992) to prevent uncontained engine strut fire.
Whether AD 2003-16-06 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.