AD 66-16-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
Unsafe Condition
Failure of the flap asymmetry switch to continuously detect an asymmetric condition as the asymmetry increases above the 3 degree setting.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rewire asymmetry system in accordance with Fairchild-Hiller Service Bulletin No. 27-43, dated December 23, 1965, or later FAA-approved revision, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 300 hours' time in service after the effective date of this AD unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes, Serial Numbers 1 through 122, equipped with Center Hinge Wing Flap Asymmetry Switches, P/N 658-001.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.