- Effective
- February 19, 1975
- Models
- CH-19E, H-19A, H-19D, H-19G, HRS-1/CH-19, HRS-3/H-19B and 5 more
- Registered aircraft
- 27 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-2082
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 21 KB | 1440de6c…834711c | FAA DRS (API key needed) |
On this page
The airworthiness directive
75-04-02 SIKORSKY AIRCRAFT: Amendment 39-2082. Applies to S-55, S-55B, S-55C and S-62A Helicopters certificated in all categories, including military type HRS-1, HRS-3, CH-19, H-19B, H-19G, H-19A, H-19D, HO4S-3G, UH-19D, H19D5, UH-19B, UH-19D helicopters, equipped with P/N S10-10-3325-1 and S10-10-3325-2 main rotor spindles.
(a) Within the next 10 hours' time in service after the effective date of this AD, unless already accomplished within the preceding 50 hours' time in service, conduct a dye penetrant inspection of the exposed areas of the lugs of the main rotor spindles.
(b) If a crack is found during the above inspection, replace the cracked spindle with a spindle that has been inspected in accordance with paragraph (a) above and found to be free of cracks, prior to flight.
(c) Report in writing any cracks found during the inspection of paragraph (a) to: Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803. Each report must include the length and location of the cracks and the total time in service of the spindle.
Sikorsky message SST62A6C74.3 covers this inspection.
This amendment becomes effective February 19, 1975.
Affected TCDS · 3
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 27
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1952 | 2 |
|---|---|
| 1953 | 1 |
| 1954 | 4 |
| 1955 | 4 |
| 1956 | 2 |
| 1957 | 4 |
| 1959 | 1 |
| 1961 | 1 |
| 1978 | 1 |
| 1996 | 1 |
| 1997 | 1 |
5 with no year recorded