Airworthiness Directive 77-20-05 R1
one-timeAD 77-20-05 R1 · 1977-01-01 · reciprocating engine
Airworthiness Directives; SUBJECT HEADING: ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series ACTION: SUMMARY: DA
Which aircraft AD 77-20-05 R1 applies to
MakesSubject Heading Rolls-Royce Limited
Models2A
Whether AD 77-20-05 R1 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 77-20-05 R1 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.