AD 70-15-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-61A | Airworthiness Directives; Sikorsky S-61A, S-61L, S-61N, and S-61R Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61L | Airworthiness Directives; Sikorsky S-61A, S-61L, S-61N, and S-61R Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61N | Airworthiness Directives; Sikorsky S-61A, S-61L, S-61N, and S-61R Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61R | Airworthiness Directives; Sikorsky S-61A, S-61L, S-61N, and S-61R Helicopters |
Unsafe Condition
Intermittent operation of the Torrington A18702 Series Cabin Heater Blower Assemblies could create potential hazards.
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Required Actions
Comply with the Accomplishment Instructions (excluding paragraph D) of Sikorsky Service Bulletin No. 61B55-14 dated 1 April 1970, or later revision, or equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. Compliance time may be increased upon request with substantiation data through an FAA maintenance inspector.
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Compliance Time
within the next 25 hours' time of cabin heater operation after the effective date of this AD unless already accomplished
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Affected Aircraft
Sikorsky S-61A, S-61L, S-61N, and S-61R Helicopters incorporating Torrington A18702 Series Cabin Heater Blower Assemblies
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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