# AD 72-02-02: Fuel Line Fitting Leakage

- Type: Airworthiness directive
- Status: Current
- Products: Allied Ag Cat Productions G-164A
- Effective: October 18, 1972
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1538
- Registered aircraft: 217 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/140E38D19A68F07886256A54006FD571.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/72-02-02

## The airworthiness directive

72-02-02 GRUMMAN AIRCRAFT: Amendment 39-1374 as amended by Amendment 39-1538. Applies to Type G-164A airplanes equipped with any P&W R-1340 model engine.

Compliance required within the next 25 hours in service, unless already accomplished, after the effective date of this AD.

To preclude the possibility of fuel leakage resulting from cracks in the threaded area of certain aluminum alloy fuel line fittings, accomplish the following:

1. Replace two AN911-3D pipe thread nipples located in the carburetor inlet line and one AN911-3D nipple located at the outlet boss of the in-line fuel strainer mounted on the firewall bulkhead with corrosion resistant steel nipples P/N AN911-3S, AN911-3K or AN911-3J.

2. Replace the aluminum AN912-4D reducer at the carburetor fuel inlet boss with corrosion resistant steel reducers P/N AN912-4S or AN912-4K or AN912-4J.

Grumman S/B No. 46 and 49 covers this same subject.

Amendment 39-1374 was effective January 20, 1972.

This Amendment 39-1538 is effective October 18, 1972.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A16](https://openairdocs.org/tcds/1A16): Allied Ag Cat Productions Inc.; names 1 of 10 models: G-164A

## 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: 217 (217 by airframe model, 0 by engine model)
- Makers: Grumman Acft ENG Cor-Schweizer 150, Grumman 63, Grumman American Avn. 3, Schweizer 1

Models with the most aircraft:

- [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a): 150 aircraft (airframe model)
- [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a): 63 aircraft (airframe model)
- [Grumman American Avn. G-164A](https://openairdocs.org/model/grumman-american-avn-g-164a): 3 aircraft (airframe model)
- [Schweizer G164A](https://openairdocs.org/model/schweizer-g164a): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/72-02-02/models.md
Every aircraft: https://openairdocs.org/ad/72-02-02/aircraft.md

Its text cites no advisory circulars or STCs.

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