Airworthiness Directive 2000-20-09
one-timeAirworthiness Directives; Boeing Model 757 Series Airplanes Powered by Pratt & Whitney Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 757 series airplanes, that requires modification of the nacelle strut and wing structure. This amendment is prompted by reports indicating that the actual operational loads applied to the nacelle are higher than the analytical loads that were used during the initial design. Such an increase in loading can lead to fatigue cracking in primary strut structure prior to an airplane reaching its design service objective. The actions specified by this AD are intended to prevent fatigue cracking in primary strut structure and consequent reduced structural integrity of the strut.
Which aircraft AD 2000-20-09 applies to
Modify nacelle strut and wing structure (both sides) per Boeing SB 757-54-0034 (dated May 14, 1998), addressing fatigue cracking in primary strut structure, prior to 37,500 total flight cycles or 20 years since date of manufacture (or optional threshold formula), whichever is later, or within 3,000 flight cycles after the AD effective date. Concurrent actions per Boeing SB 757-54-0027 Rev 1 and SB 757-54-0036 also required as applicable.
Whether AD 2000-20-09 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.