- Effective
- March 31, 1978
- Models
- S-58BT, S-58DT, S-58ET, S-58FT, S-58HT, S-58JT
- Data sheet
- TCDS1H11
- Registered aircraft
- 10 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-3146
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 | 19 KB | 0610f9b9…709aa33 | FAA DRS (API key needed) |
On this page
The airworthiness directive
78-05-01 SIKORSKY AIRCRAFT: Amendment 39-3146. Applies to all Model S-58T series helicopters.
Compliance required prior to May 25, 1978.
To preclude possible fuel starvation of the PT6T-3 and PT6T-6 engines resulting from oil-to-fuel heater contamination, relocate the impending fuel bypass sensor lines on both engine power sections in accordance with the instructions set forth in Part II, Paragraph A, of Sikorsky Service Bulletin No. 58B30-12C, dated January 12, 1976.
This amendment becomes effective March 31, 1978.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 10
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1956 | 1 |
|---|---|
| 1957 | 2 |
| 1958 | 2 |
| 1959 | 1 |
| 1962 | 3 |
1 with no year recorded