Airworthiness Directive 79-22-04
one-timeAirworthiness Directives; disconnected prior to further flight in a manner which will not permit use or reconnection during flight. Install a placard in ful
Which aircraft AD 79-22-04 applies to
Disconnect the affected system prior to further flight in a manner that will not permit use or reconnection during flight; install a placard in full view of the pilot with lettering at least 1/4 inch high. Amendment 39-3600, effective November 9, 1979.
Whether AD 79-22-04 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.