# AD 46-37-02: Fuel Strainer Position

- Type: Airworthiness directive
- Status: Current
- Products: Piper J3C-65S and J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2))
- Published: June 17, 1950
- Issued: June 17, 1950
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 27 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2F4571A2CDBA251F8625698B00763897.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/46-37-02

## The airworthiness directive

46-37-02 PIPER: (Was Mandatory Note 13 of AD-691-2.) Applies to J3C-65, J3C-65S, Serial Numbers 14027 Through 17959, Inclusive.

Compliance required immediately.

Affected airplanes should be examined immediately to ascertain that the fuel strainer is properly installed. The strainer should be installed with the IN port adjacent to the firewall and the OUT port facing the carburetor. If the strainer is not installed as above, it should be reversed for proper fuel flow.

(Piper Service Bulletin No. 91 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-691](https://openairdocs.org/tcds/A-691): Piper Aircraft Inc.; names 2 of 7 models: J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2)), J3C-65S

## 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: 27 (27 by airframe model, 0 by engine model)
- Makers: Piper 27

Models with the most aircraft:

- [Piper J3C-65S](https://openairdocs.org/model/piper-j3c-65s): 27 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/46-37-02/models.md
Every aircraft: https://openairdocs.org/ad/46-37-02/aircraft.md

Its text cites no advisory circulars or STCs.

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