# AD 84-09-07: Plug Type Drain Fittings Replacement

- Type: Airworthiness directive
- Status: Current
- Products: Maule Aerospace Technology Bee Dee M-4, M-4, M-4-180C, M-4-210, M-4-210C, M-4-210S, M-4-210T, M-4-220, M-4-220C, M-4-220S, M-4-220T, M-4C and 8 more
- Effective: May 12, 1984
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4860
- Registered aircraft: 569 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C52F7F52D88F6B686256A4D00457AE9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/84-09-07

## The airworthiness directive

84-09-07 MAULE AEROSPACE TECHNOLOGY (Formerly Maule Aircraft Corp.): Amendment 39-4860. Applies to Models M-4 and M-5 Series airplanes equipped with plug type drain fittings in the main and auxiliary fuel tanks certificated in any category.

Compliance: Required within the next 50 hours time-in-service, unless already accomplished.

To provide a convenient means to drain fuel system water contamination, accomplish the following:

  (a) Replace all plug type drain fittings in the main and auxiliary fuel tanks with quick drain valves in accordance with Maule Service Bulletin No. 5 and Maule Service Letter No. 32.

NOTE: Some airplanes are not equipped with Auxiliary fuel tanks.

  (b) Install the following, or later FAA approved Flight Manual revisions or supplements as applicable in the airplane.

M-4 AFM Rev. 2 M-5-180C Rev. D M-4-180C Rev. A M-5-210TC Rev. B M-4-220C Rev. 5 M-5-235C Rev. A (AFM dated 12 Aug. 81) M-5-210C Rev. B M-5-235C AFM(dated 6 April 1976) Supplement No. 13 M-5-220C Rev. A M-4-210 & M-4-210C AFM Supplement No. 10

  (c) Airplanes may be flown in accordance with 21.197 to a location where this AD may be accomplished.

  (d) An equivalent method of compliance with this AD may be used if approved by the Manager, Atlanta Aircraft Certification Office, ACE-115A, 1075 Inner Loop Road, College Park, Georgia 30337.

This amendment becomes effective on May 12, 1984.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A23](https://openairdocs.org/tcds/3A23): Maule Aerospace Technology Inc.; names 20 of 50 models: M-4-210, M-4-220T, M-4-210C, M-5-235C, M-5-220C, M-4-220, M-4, M-4C…

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 569 (569 by airframe model, 0 by engine model)
- Makers: Maule 569

Models with the most aircraft:

- [Maule M-5-235C](https://openairdocs.org/model/maule-m-5-235c): 181 aircraft (airframe model)
- [Maule M-5-210C](https://openairdocs.org/model/maule-m-5-210c): 94 aircraft (airframe model)
- [Maule M-4-220C](https://openairdocs.org/model/maule-m-4-220c): 83 aircraft (airframe model)
- [Maule M-5-180C](https://openairdocs.org/model/maule-m-5-180c): 57 aircraft (airframe model)
- [Maule M-4-210C](https://openairdocs.org/model/maule-m-4-210c): 46 aircraft (airframe model)
- [Maule M-4](https://openairdocs.org/model/maule-m-4): 42 aircraft (airframe model)
- [Maule M-5-220C](https://openairdocs.org/model/maule-m-5-220c): 27 aircraft (airframe model)
- [Maule M-4-210](https://openairdocs.org/model/maule-m-4-210): 12 aircraft (airframe model)
- [Maule M-4C](https://openairdocs.org/model/maule-m-4c): 6 aircraft (airframe model)
- [Maule BEE DEE M-4-210](https://openairdocs.org/model/maule-bee-dee-m-4-210): 5 aircraft (airframe model)
- [Maule BEE DEE M-4](https://openairdocs.org/model/maule-bee-dee-m-4): 4 aircraft (airframe model)
- [Maule M-4-180C](https://openairdocs.org/model/maule-m-4-180c): 4 aircraft (airframe model)
- [Maule M-5-210TC](https://openairdocs.org/model/maule-m-5-210tc): 4 aircraft (airframe model)
- [Maule M-4-210S](https://openairdocs.org/model/maule-m-4-210s): 1 aircraft (airframe model)
- [Maule M-4S](https://openairdocs.org/model/maule-m-4s): 1 aircraft (airframe model)
- [Maule M-4T](https://openairdocs.org/model/maule-m-4t): 1 aircraft (airframe model)
- [Maule M-5-200](https://openairdocs.org/model/maule-m-5-200): 1 aircraft (airframe model)

All 18 models: https://openairdocs.org/ad/84-09-07/models.md
Every aircraft: https://openairdocs.org/ad/84-09-07/aircraft.md

Its text cites no advisory circulars or STCs.

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