Airworthiness Directive 2002-11-10
one-timeAirworthiness Directives; Sikorsky Model S-70A and S-70C Helicopters
What this AD requires
This amendment supersedes an existing airworthiness directive (AD) for Sikorsky Model S-70A and S-70C helicopters. That AD currently requires inspecting a certain part-numbered main landing gear drag beam (beam) for a crack, removing any cracked beam before further flight, and reducing the torque of the jackpad mounting bolt retention nut (nut) of each beam. This amendment contains the same actions but requires those actions for another beam part number (P/N). This amendment is prompted by the inadvertent omission in the current AD of the additional beam that is susceptible to failure due to stress corrosion resulting from sustained excessive tensile stress due to excessive torque of the nut. The actions specified by this AD are intended to prevent excessive torque of the nut, failure of a beam, and subsequent loss of control of the helicopter during takeoff or landing.
Which aircraft AD 2002-11-10 applies to
Inspects main landing gear drag beam P/N 70250-12105/-32105 for cracking at the jackpad holes and retorques the jackpad mounting bolt retention nut P/N MS21245-L12, per Sikorsky Alert SB No. 70-03-2 dated July 26, 1999, and Sikorsky Model S-70 Maintenance Manual Temporary Revision No. 19.
Whether AD 2002-11-10 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 →Read the full directive (Federal Register)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.