Airworthiness Directive 2003-14-18
one-timeAirworthiness Directives; Sikorsky Aircraft Corporation Model S76A, B, and C Helicopters
What this AD requires
This amendment adopts a new airworthiness directive (AD) for the specified Sikorsky Aircraft Corporation (Sikorsky) model helicopters that requires removing non-conforming main landing gear brake discs (discs) and replacing them with different part-numbered airworthy discs. It also requires revising the Rotorcraft Flight Manual (RFM) to adjust takeoff and landing distances until the discs are replaced. This amendment is prompted by the manufacture of some discs using inferior materials. The actions specified by this AD are intended to prevent reduced braking performance and subsequent loss of control of the helicopter.
Which aircraft AD 2003-14-18 applies to
Applies to Sikorsky S-76 helicopters with main landing gear brake assembly P/N 5007555, 5007555-1, or 5007555-2. Within 60 days, determine whether brake disc P/N 5014067 is installed; if so, within 90 days replace it with disc P/N 5007672 and re-identify the brake assembly as P/N 5007555-3 or 5007555-4 per Aircraft Braking Systems Corp. ASB S76-32-A24/A25. Until replaced, RFM rejected-takeoff and landing distances must be multiplied by 1.67.
Whether AD 2003-14-18 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.