- Effective
- December 10, 1976
- Model
- 107-II
- Data sheet
- TCDS1H16
- Registered aircraft
- 12 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-2784
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.
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| FAA DRS HTML | 21 KB | 15b53ef7…ee0c968 | FAA DRS (API key needed) |
On this page
The airworthiness directive
76-25-03 BOEING VERTOL: Amendment 39-2784. Applies to Boeing Vertol Model 107-11 Helicopters Certificated in all Categories.
Compliance required as follows:
To detect corrosion which could lead to cracking of the main rotor blade spars accomplish the following within the next 60 days unless already accomplished within the past 34 months and every 36 months thereafter.
a) Inspect for corrosion, and alter if necessary, main rotor blades P/N's 107R1202 and SK24790 series in accordance with Boeing Vertol Company Service Bulletin No. 107-333 (R-1) dated July 1, 1976, Section 2 (Accomplishment Instructions" or Boeing Vertol Company Service Bulletin No. 107-334 dated October 29, 1976, Section 2 "Accomplishment Instructions" or equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
b) If spar corrosion exceeds the limits in either of the above service bulletins or those approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, replace the main rotor blade with one that has been inspected and altered if necessary, in accordance with one of the above service bulletins and/or an acceptable equivalent procedure.
This amendment is effective December 10, 1976.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 12
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1962 | 5 |
|---|---|
| 1963 | 1 |
| 1964 | 3 |
| 1965 | 1 |
2 with no year recorded