AD 73-15-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-61A | Airworthiness Directives; Sikorsky Models S-61A, S-61D, S-61E, S-61V, and S-61L Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61D | Airworthiness Directives; Sikorsky Models S-61A, S-61D, S-61E, S-61V, and S-61L Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61E | Airworthiness Directives; Sikorsky Models S-61A, S-61D, S-61E, S-61V, and S-61L Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61L | Airworthiness Directives; Sikorsky Models S-61A, S-61D, S-61E, S-61V, and S-61L Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61V | Airworthiness Directives; Sikorsky Models S-61A, S-61D, S-61E, S-61V, and S-61L Helicopters |
Unsafe Condition
Fatigue failures of the rear fuselage and pylon hinge fitting assemblies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect hinge fittings within 15 hours time in service after the effective date using Section 2A of Service Bulletin 61B20-6A or equivalent. Daily inspections thereafter per Section 2C. Every 150 hours time in service, inspect per Section 2G. For pylon fittings, inspect within 15 days after effective date per Section 2B, then every 50 hours per Section 2D, and every 150 hours per Section 2F. Replace cracked fittings before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 15 hours time in service after the effective date of this AD (for part (a)(1)), within 15 days after the effective date (for part (b)(1)), and thereafter at specified intervals as outlined.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Models S-61A, S-61D, S-61E, S-61V, and S-61L Helicopters certificated in all categories.
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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