AD 84-09-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maule Aerospace Technology, Inc. | Bee Dee M-4 | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4 | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-180C | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-210 | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-210C | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-210S | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-210T | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-220 | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-220C | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
| aircraft | Maule Aerospace Technology, Inc. | M-4-220S | Airworthiness Directives; Maule Model M-4 and M-5 Series Airplanes |
Unsafe Condition
Plug type drain fittings in the main and auxiliary fuel tanks may fail to provide a convenient means to drain fuel system water contamination.
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Required Actions
Replace all plug type drain fittings in main and auxiliary fuel tanks with quick drain valves per Maule Service Bulletin No. 5 and Service Letter No. 32. Install specified FAA approved Flight Manual revisions or supplements. Use equivalent methods if approved by Atlanta Aircraft Certification Office.
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Compliance Time
within the next 50 hours time-in-service
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Affected Aircraft
Maule Aerospace Technology, Models M-4 and M-5 Series airplanes equipped with plug type drain fittings in main and auxiliary fuel tanks.
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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.