AD 82-01-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-58A | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58B | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58BT | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58C | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58D | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58DT | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58E | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58ET | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58F | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58FT | Airworthiness Directives; SIKORSKY AIRCRAFT Models S-58/S-58T Series Helicopters |
Unsafe Condition
Fatigue failure of the main rotor head horizontal hinge pins, P/Ns S1610-23020-2, -3, and -4.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace main rotor head horizontal hinge pins with serviceable parts prior to accumulating 1,000 hours time in service. Subsequent replacements must occur within 1,000 hours time in service. Untraceable-hour pins require replacement within 100 hours time in service from the AD's effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 100 hours time in service after the effective date of this AD, whichever occurs later. Thereafter, replace... at intervals not to exceed 1,000 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft Models S-58/S-58T series helicopters including Military Type HSS-1, HSS-1F, HSS-1N, HUS-1, HUS-1A, HUS-1AN, HUS-1G, HUS-1Z, H-34A, H-34C, H-34J, CH-34A, CH-34C, HH-34F, HH-34J, SH-34G, SH-34H, SH-34J, UH-34D, UH-34E, UH-34G, UH-34J, VH34C, and VH-34D.
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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