AD 78-05-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-61N | Airworthiness Directives; Sikorsky Model S-61N Rotorcraft |
Unsafe Condition
Inadvertent landing gear retraction due to insufficient protection in the main landing gear electrical system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the main landing gear electrical system in accordance with Sikorsky Service Bulletin 61B55-40 or later FAA approved revision.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 300 hours time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Model S-61N rotorcraft prior to and including Sikorsky Serial No. 61805.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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