# AD 51-03-01: Fuel Line Rework

- Type: Airworthiness directive
- Status: Current
- Products: Mooney Mite M-18C, M-18C 55, M-18L and M-18LA
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 98 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6C0DD2464BB2101386256A4500595D5A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/51-03-01

## The airworthiness directive

51-03-01 MOONEY: Applies to Model M-18 Series Aircraft, Serial Numbers 1 Through 82 and 201 Through 236. Compliance required not later than March 15, 1951. There have been reported failures of the fuel line due to vibration and relative motion between the fuel tank and the fuel shutoff valve. To preclude the possibility of recurrence of this type failure, cut the fuel line at a point approximately 4 inches from the fuel tank outlet and install a 4-inch length of 3/8-inch ID approved aromatic resistant flexible hose and hose clamps at this point. (Mooney Service Bulletin No. 6 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-803](https://openairdocs.org/tcds/A-803): Mooney Mite Aircraft Corporation; names 4 of 4 models: M-18L, M-18C, M-18C 55, M-18LA

## 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: 98 (98 by airframe model, 0 by engine model)
- Makers: Mooney 98

Models with the most aircraft:

- [Mooney M-18C](https://openairdocs.org/model/mooney-m-18c): 52 aircraft (airframe model)
- [Mooney M-18L](https://openairdocs.org/model/mooney-m-18l): 23 aircraft (airframe model)
- [Mooney M-18C 55](https://openairdocs.org/model/mooney-m-18c-55): 12 aircraft (airframe model)
- [Mooney M-18LA](https://openairdocs.org/model/mooney-m-18la): 11 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/51-03-01/models.md
Every aircraft: https://openairdocs.org/ad/51-03-01/aircraft.md

Its text cites no advisory circulars or STCs.

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