Is AD 87-05-51 a recurring Airworthiness Directive?

No — AD 87-05-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 87-05-51

Q: Which aircraft does AD 87-05-51 apply to?

AD 87-05-51 applies to Boeing, Mcdonnell Douglas, Lockheed, Dehavilland, Fairchild, Nihon, Grumman — models Boeing 727-100, DC-9-15, Boeing 727-200, Nihon YS-11A, Lockheed L-1011, DC-8-62, DC-8-63, Dehavilland DHC-7. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 87-05-51 · 1987-01-01 · appliance

Airworthiness Directives; BOEING, MCDONNELL DOUGLAS, LOCKHEED, DEHAVILLAND, FAIRCHILD, NIHON, AND GRUMMAN Specified Models

Which aircraft AD 87-05-51 applies to

MakesBoeing Mcdonnell Douglas Lockheed Dehavilland Fairchild Nihon Grumman

ModelsBoeing 727-100, DC-9-15, Boeing 727-200, Nihon YS-11A, Lockheed L-1011, DC-8-62, DC-8-63, Dehavilland DHC-7, DC-9-50, DC-9-80

Part-conditional — SA3688SW, SA3689SW, SA3691SW, SA3694SW, SA3695SW, SA3696SW, SA3697SW, SA3698SW.

Applies to specific serial-numbered airplanes modified under the listed STCs (SA3688SW Boeing 727-100, SA3689SW DC-9-15, SA3691SW Boeing 727-200, SA3694SW Nihon YS-11A, SA3695SW Lockheed L-1011, SA3696SW DC-8-62/-63, SA3697SW DHC-7, SA3698SW DC-9-15/-50/-80). Fairchild and Grumman models referenced in the heading are not resolved in the truncated source text. Effective May 18, 1987.

Whether AD 87-05-51 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:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 87-05-51 complied with on your aircraft?

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 →

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.