Airworthiness Directive 85-24-04
one-timeAD 85-24-04 · 1985-01-01 · airframe
Airworthiness Directives; the left wing root leading edge fairing to gain access to the left outboard wing proportioning unit. b. Remove the right wing root
Which aircraft AD 85-24-04 applies to
MakesLeft Wing Root Leading Edge Fairing To Gain Access To Left Outboard Wing Proportioning Unit B Remove Right Wing Root Leading Edge Fairing To Gain Access To Right Installed In Proper Location Table 1 Proportioning Unit Part Number Location Part Number Location Pu306Dw38 Left And Right Wing Root Pu306Dc39 Right Wing Root (Left And Right Inboard Wing-
ModelsS550
Whether AD 85-24-04 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:
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 85-24-04 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.