- Effective
- September 10, 1974
- Models
- HRS-1/CH-19, HRS-3/H-19B
- Data sheet
- TCDSHR1SO
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-1953
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 | 6bd5b0f7…131f8b1 | FAA DRS (API key needed) |
On this page
The airworthiness directive
74-19-04 SIKORSKY: Amendment 39-1953. Applies to all HRS/H-19 Series Helicopters certificated in all categories.
Compliance with each of the following Airworthiness Directives for the Sikorsky S-55 Series Helicopters is required, except that the effective date of each will be the effective date of this Airworthiness Directive: 54-1-3, 54-13-1, 54-16-1, 54-19-2, 54-20-2, 55-25-4, 56-16-3, 56- 23-3, 60-13-4, 63-5-2 (AD 63-5-2 extended service life to 1200 hours when operating in the Restricted Category and over sparsely populated areas), 65-8-2, 66-4-3 (AD 66-4-3 extended service life to 3500 hours, when operating in the Restricted Category and over sparsely populated areas), 67-17-6, 67-29-7 and 71-26-3.
This amendment becomes effective September 10, 1974.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.