- Effective
- May 19, 1968
- Models
- F-27, F-27A, F-27B, F-27F, F-27G, F-27J, F-27M
- Data sheet
- TCDS7A1
- Registered aircraft
- 1 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-583
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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|---|---|---|---|
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On this page
The airworthiness directive
68-08-03 FAIRCHILD-HILLER: Amdt. 39-583. Applies to all F-27 type aircraft Serial Nos. 1 to 95 inclusive incorporating a combustion heater system.
Compliance required as indicated unless already accomplished, or unless installed heaters are rendered electrically inoperative and heater controls are placarded to prohibit operation prior to compliance with this AD.
To preclude the possibility of residual fuel fire in the heater outer air passage due to lack of adequate drainage, accomplish the following:
(a) Within the next 400 operational heater hours after the effective date of this AD, incorporate a heater outer pass drain installation in accordance with Fairchild Service Bulletin No. 21-68 Revision No. 1 dated November 10, 1964, or later FAA-approved revision, or an equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
(b) Upon the effective date of this AD heater operational hours will be logged until such time as the AD has been complied with.
This amendment effective May 19, 1968.
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.