# AD 79-02-02: Fuel Supply Lines

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-44-180
- Effective: January 24, 1979
- Published: January 22, 1979
- Issued: January 10, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3398
- Registered aircraft: 562 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C03185D5862CD4128625699E004AE8A3.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/79-02-02

## The airworthiness directive

79-02-02 PIPER AIRCRAFT CORPORATION: Amendment 39-3398. Applies to Model PA-44-180, serial numbers 44-7995001 through 44-7995003, 44-7995005 through 44-7995023, 44-7995025 through 44-7995053, 44-7995055 through 44-7995064, 44-7995066, 67, 69, 71, 73, and 74 airplanes certificated in all categories.

Compliance is required within the next 10 hours' time in service after the effective date of this AD unless already accomplished.

To prevent fuel leakage due to a damaged fuel line, accomplish the following:

  (a) Remove the inspection plate (or plates) on the underside of the left and right wings, in the area of the electric fuel boost pump, inboard of the engine nacelle.

  (b) Inspect the fuel supply lines part number 86238-03 (Left and Right), where the line passes through the rib lightening hole, for damage due to interference with the hole flange. If a fuel supply line is damaged, replace it with a serviceable line.

  (c) Install a caterpillar grommet, part number 63976-34 (MS21266-1N) on the lower half of the rib lightening hole flange in both wings using a suitable cement to retain the grommet in position.

  (d) Position the fuel supply line to obtain a minimum clearance of .125 inch from the caterpillar grommet.

  (e) Reinstall the inspection plates on the left and right wings.

  (f) Make an appropriate maintenance record entry.

  (g) An alternate method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region.

NOTE: Piper Service Bulletin; 627, dated October 24, 1978, pertains to this subject.

This amendment becomes effective January 24, 1979.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A19SO](https://openairdocs.org/tcds/A19SO): Piper Aircraft Inc.; names 1 of 2 models: PA-44-180

## 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: 562 (562 by airframe model, 0 by engine model)
- Makers: Piper 558, New Piper 4

Models with the most aircraft:

- [Piper PA-44-180](https://openairdocs.org/model/piper-pa-44-180): 558 aircraft (airframe model)
- [New Piper PA-44-180](https://openairdocs.org/model/new-piper-pa-44-180): 4 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/79-02-02/models.md
Every aircraft: https://openairdocs.org/ad/79-02-02/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.