- Effective
- May 6, 1967
- Models
- F-27, F-27A, F-27B, F-27F, F-27G, F-27J and 6 more
- Data sheet
- TCDS7A1
- Registered aircraft
- 1 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-407
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 | 34e8192c…236c5f2 | FAA DRS (API key needed) |
On this page
The airworthiness directive
67-15-02 FAIRCHILD-HILLER: Amdt. 39-407 Part 39 Federal Register May 6, 1967. Applies to Model F-27 and FH-227 Series Airplanes.
Compliance required within the next 200 hours' time in service after the effective date of this AD unless already accomplished.
To compensate for the loss of electrical power to the flight instruments required by former CAR 4b.603(e), (f), (g) (effective December 31, 1953) in the event of a single ground fault in the d.c. power system, accomplish the following:
(a) In aircraft, where the emergency electrical power to operate attitude indicator, turn and bank indicator and gyroscopic direction indicator is derived from the d.c. power system, modify the emergency electrical power system to these instruments in accordance with Allegheny Airlines Engineering Order 67-81F or later FAA-approved revision, or an FAA-approved equivalent approved by the Chief, Engineering and Manufacturing Branch, Eastern Region.
(b) Upon request and submission of substantiating data, an FAA maintenance inspector may adjust the compliance time specified in this AD to permit compliance at an established inspection period.
This directive effective May 6, 1967.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.