AD 62-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227 | Airworthiness Directives; FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes |
Unsafe Condition
Walter Kidde Company Chemical Drier Housing, P/N 890395, is subject to cycling failure at a time limit lower than originally established by the manufacturer.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove P/N 890395 at each 2,000 hours' time in service or 2 years, whichever occurs first. Install P/N 890800-0001 as replacement, which must be removed at each 4,300 hours' time in service or 20,000 cycles of chemical drier operation. Visually inspect all housings at each cartridge change; replace if cracking, distortion, or excessive corrosion is found. Ensure wall thickness after corrosion removal meets specified minimums and apply corrosive resistant finish.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
FAIRCHILD-HILLER Model F-27 Series and FH-227 Airplanes equipped with Walter Kidde Company Chemical Drier Housings P/N 890395 and P/N 890800-0001.
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
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