# AD 79-12-11: Fuel Primer Modification Kits

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-44-180
- Effective: June 21, 1979
- Published: June 18, 1979
- Issued: June 4, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3490
- Registered aircraft: 562 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0FA422DD857176538625699E004AF185.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/79-12-11

## The airworthiness directive

79-12-11 PIPER AIRCRAFT CORPORATION: Amendment 39-3490. Applies to Model PA-44-180, serial numbers 44-7995001 through 44-7995190 airplanes certificated in all categories.

Compliance is required within the next 25 hours' time in service after the effective date of this AD or within 30 days after the effective date of this AD, whichever occurs first, unless already accomplished.

To prevent a potential fire hazard due to fuel leakage from failed primer lines and cracked and broken fittings, accomplish the following on both engines:

  (a) Install the fuel primer modification kit, Piper Part Number 763 908V in accordance with Piper Service Bulletin 634 dated December 28, 1978, or later revision approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region.

  (b) Make an appropriate maintenance record entry.

An equivalent method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, FederalAviation Administration, Southern Region.

This amendment becomes effective June 21, 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/79-12-11/models.md
Every aircraft: https://openairdocs.org/ad/79-12-11/aircraft.md

Its text cites no advisory circulars or STCs.

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