Horizontal Stabilizer - Forward Root Fitting / Strut Fitting - Life Limit / Inspection
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Sikorsky S-92A helicopters must establish and adhere to the life limits for affected forward root fittings and stabilizer strut fittings, perform repetitive inspections as specified, and remove any parts from service if inspection results indicate damage or wear. The directive is effective February 1, 2021, and compliance with inspection and replacement requirements must begin by that date.
Summary
The Federal Register Volume 85, Number 248, Final Rule titled "Horizontal Stabilizer - Forward Root Fitting / Strut Fitting - Life Limit / Inspection" is an airworthiness directive issued by the FAA for Sikorsky Aircraft Corporation Model S-92A helicopters. This directive addresses fatigue cracks found in the horizontal stabilizer forward root fittings and establishes life limits and inspection requirements for specific part-numbered forward root fittings and stabilizer strut fittings.
What changed
This new airworthiness directive introduces mandatory life limits for certain forward root fittings and stabilizer strut fittings on Sikorsky S-92A helicopters. It requires repetitive inspections of stabilizer assembly attachment bolts, fittings, and fasteners, and mandates removal of parts from service based on inspection outcomes. Additionally, it prohibits installation of certain stabilizer assemblies on any helicopter.
Why it matters
This directive is critical for aviation professionals because fatigue cracks in the horizontal stabilizer forward root fitting can compromise the load path and increase stress on other components, potentially leading to unsafe flight conditions. Operators and maintenance organizations must comply to ensure continued airworthiness and safety of the affected helicopters. Compliance helps prevent structural failures and costly unscheduled repairs.
More for Sikorsky S-92
All 14- EASA AD 2015-0226R8Equipment / Furnishings — Hoist — Test / ReplacementJul 16, 2025
- EASA AD US-2023-09-07Main Rotor - Swashplate Assembly - Inspection / RemovalJun 26, 2023
- EASA AD US-2022-11-04Horizontal Stabilizer Forward Root / Strut Fittings - Life Limit / InspectionJun 21, 2022
- EASA AD US-2022-02-01SUPERSEDED BY FAA AD 2023-09-07Feb 11, 2022
- EASA AD US-2021-19-17Equipment / Furnishings - Utility Seats and Observer Seats - ModificationNov 22, 2021
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