AD 59-18-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild All F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild All F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild All F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild All F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild All F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild All F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild All F-27 Series Airplanes |
Unsafe Condition
Leakage at the heater fuel line fittings could lead to fuel leakage and potential fire hazard.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and modify shroud assemblies by punching 1/8-inch holes, remove existing drain tube assemblies, install new drain tube assembly P/N 27-774750-11, install modified shroud assemblies with specified clamps, bolts, and nuts, install new hoses with clamps, and install new plates and clamps with screws and nuts. Specific modifications include drilling a 5/8-inch hole on airplanes 1-6 and installing a grommet and skin patch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than October 15, 1959
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fairchild F-27 Series aircraft equipped with the heater system, including models F-27, F-27A, F-27B, F-27F, F-27G, F-27J, F-27M
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.