AD 75-26-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-61L | Airworthiness Directives; Sikorsky Models S-61L, S-61N, and S-61NM Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61N | Airworthiness Directives; Sikorsky Models S-61L, S-61N, and S-61NM Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61NM | Airworthiness Directives; Sikorsky Models S-61L, S-61N, and S-61NM Helicopters |
Unsafe Condition
The unsafe condition involves the potential failure of S-61 helicopter components due to insufficient replacement schedules, as identified through an engineering evaluation program and additional substantiating data.
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Required Actions
Replace S-61 components in accordance with the schedule of Section 2C of Sikorsky Service Bulletin No. 61B General-1F dated October 20, 1975, or later FAA approved revisions.
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Compliance Time
After the effective date of this AD
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Affected Aircraft
Sikorsky Models S-61L, S-61N, and S-61NM helicopters certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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