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Airworthiness Directive 91-19-03

one-time
AD 91-19-03 · 1991-01-01 · reciprocating engine

Airworthiness Directives; HEADING: TELEDYNE CONTINENTAL MOTORS (TCM) Models IO-360, L/TSIO-360, IO-346, L/I/O-470, TSIO-470, IO-520, L/TSIO-520, 6-285, IO-5

Which aircraft AD 91-19-03 applies to

MakesContinentalTeledyne ContinentalTeledyne-ContinentalTcm
ModelsIO-360, TSIO-360, IO-346, O-470, IO-470, TSIO-470, IO-520, TSIO-520

broad Continental piston-engine family list — applicability read from the AD title (pre-1994 directive, no full text on file) — confirm the exact engine model, serial, and compliance status from the records

Whether AD 91-19-03 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 91-19-03 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.

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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.