Airworthiness Directive 71-04-03
one-timeAirworthiness Directives; of American Aviation Service Bulletin No. 121A dated 1/8/71 or with an equivalent method. (b) Replace defective parts prior to fur
Which aircraft AD 71-04-03 applies to
Comply with American Aviation Service Bulletin No. 121A, dated 1/8/71, or an equivalent method; replace defective parts prior to further flight with a part received from the manufacturer after 1 June 1970, or inspected and tested in accordance with the bulletin.
Whether AD 71-04-03 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:
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.