- Effective
- November 3, 1967
- Models
- HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B, S-55C
- Registered aircraft
- 17 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-504
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 |
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| FAA DRS HTML | 21 KB | 12545fb3…68dee61 | FAA DRS (API key needed) |
On this page
The airworthiness directive
67-29-07 SIKORSKY: Amdt. 39-504 Part 39 Federal Register November 3, 1967. Applies to Type S-55 Helicopters equipped with Wright R-1300 engines (Restricted and Normal Category).
Compliance required as indicated.
To prevent fatigue failure of the azimuth control rod assembly, P/N S1440-2105-1, accomplish the following:
(a) Remove from service all control rod assemblies, P/N S1440-2105-1, with 725 or more hours' time in service on the effective date of this AD within the next 25 hours' time in service.
(b) Remove from service all other control rod assemblies P/N S1440-2105-1, before the accumulation of 750 hours' time in service.
(c) Within the next 15 hours' time in service after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 50 hours' time in service from the last inspection, inspect the control rod assembly in accordance with paragraph B of Sikorsky Service Bulletin No. 55B40-5, dated October 18, 1967, or later revisions approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Eastern Region. Equivalent inspections may be approved by an FAA maintenance inspector.
This amendment effective November 3, 1967.
Affected TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 17
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1952 | 1 |
|---|---|
| 1953 | 1 |
| 1954 | 3 |
| 1955 | 3 |
| 1956 | 2 |
| 1957 | 2 |
| 1959 | 1 |
| 1996 | 1 |
| 1997 | 1 |
2 with no year recorded