# AD 78-13-08: Engine Fuel Supply

- Type: Airworthiness directive
- Status: Current
- Products: Maule Aerospace Technology M-5-210C and M-5-235C
- Effective: July 5, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3251
- Registered aircraft: 275 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B5CAFC900F1B51EA86256A3800651F42.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-13-08

## The airworthiness directive

78-13-08 MAULE AIRCRAFT CORPORATION: Amendment 39-3251. Models M-5- 210C, S/N 6190C through 6204C, M-5-235C, S/N 7061C through 7160C, 7163C through 7167C, 7169C through 7192C, 7194C and 7197C. To prevent reduction of fuel feed or supply to the engine, accomplish the following within the next 25 hours' time in service: Remove the wing root fairings on both sides to gain access to both main tank outlets (two outlets per tank). (1) If the fuel line tube clamps do not have hexagonal heads, no further inspection is necessary. Replace fairing and return aircraft to service. (2) If the fuel line tube clamps have hexagonal heads, drain fuel tanks, and loosen the tube clamp(s), pull the fuel hose off of the fuel line(s) and tank outlets and inspect tube(s) for deformed tube sections. If fuel line tube(s) are deformed, replace tube(s), front tubes Maule P/N 5092X-7 left, 5092X-8 right; rear tube(s) P/N 5092X-1 left and 5092X-9 right. Use round head Aeroseal hose clamps P/N QS-100-M8S, or existing hose clamps, during reassembly. Torque clamps to 15-20 inch pounds. Leak check fuel system prior to returning aircraft to service. An alternate method of compliance with this A. D. may be used if approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region, Atlanta, Georgia. Maule Service Letter 39 dated May 10, 1978, or later FAA approved revision, pertains to the same subject. This amendment becomes effective July 5, 1978.

## 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 2 of 50 models: M-5-235C, M-5-210C

## 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: 275 (275 by airframe model, 0 by engine model)
- Makers: Maule 275

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)

All 3 models: https://openairdocs.org/ad/78-13-08/models.md
Every aircraft: https://openairdocs.org/ad/78-13-08/aircraft.md

Its text cites no advisory circulars or STCs.

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