Main Rotor Drive - Auxiliary Circuit Breaker Modification Kits - Installation / Rotorcraft Flight Manual - Update
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Sikorsky Model S-92A helicopters with serial numbers 920006 through 920304 inclusive and 920311 through 920314 inclusive must install the specified modification kits and update the Rotorcraft Flight Manual within 400 hours time-in-service. They should coordinate with Sikorsky Field Representatives or access Sikorsky service instructions to complete the required modifications by the effective date.
Summary
The Federal Aviation Administration Airworthiness Directive 2020-16-19 is a final rule addressing certain Sikorsky Aircraft Corporation Model S-92A helicopters. It mandates installation of auxiliary circuit breaker modification kits and insertion of a Rotorcraft Flight Manual Supplement to correct erroneous low oil pressure caution indications and unintended main gearbox auto bypass valve actuation.
What changed
This new airworthiness directive introduces requirements to install specific modification kits including auxiliary circuit breaker panels and related hardware on affected Sikorsky S-92A helicopters. It also requires updating the Rotorcraft Flight Manual with a supplement detailing new operating procedures and limitations to mitigate the unsafe condition.
Why it matters
This directive is critical for aviation professionals because it prevents false cockpit warnings that could confuse flight crews and lead to unnecessary or forced landings. Compliance ensures continued airworthiness and safety of the Sikorsky S-92A fleet by addressing a previously unknown cause of circuit breaker tripping and erroneous gearbox oil pressure indications.
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
Get the next one by email
New ADs and bulletins for Sikorsky S-92 and S-92A, summarized like this page, every Monday.