Airworthiness Directive 87-21-01
one-timeAD 87-21-01 · 1987-01-01 · airframe
Airworthiness Directives; becomes effective on November 2, 1987. FOOTER: Aerostar Aircraft Corporation Piper Aircraft Inc. PA-60-600 (Aerostar 600) PA-60-60
Which aircraft AD 87-21-01 applies to
MakesAerostar Aircraft CorporationPiper Aircraft Inc.
ModelsPA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P), PA-60-602P (Aerostar 602P), PA-60-700P (Aerostar 700P), PA-31, PA-31-300, PA-31-325, PA-31-350, PA-31P, PA-31P-350, PA-60
Amendment becomes effective November 2, 1987.
Whether AD 87-21-01 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 87-21-01 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.