# AD 69-13-04: Landing Gear Warning System

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-31 and PA-31-300
- Effective: September 3, 1969
- Published: August 29, 1969
- Issued: August 19, 1969
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-826
- Registered aircraft: 29 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/778908405CAC7BB086256E010054736F.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/69-13-04

## The airworthiness directive

69-13-04 PIPER AIRCRAFT CORP: Amdt. 39-826. Applies to PA-31 and PA-31-300 airplanes, serial numbers 31-2 through 31-259.

Compliance required as indicated:

Modify the landing gear warning system to comply with FAR 23.729(e) (formerly CAR 3.359) as follows:

  (a) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, modify the aircraft in accordance with instructions contained in Piper Kit 760-250 dated October 23, 1968, or an alternative method approved by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region.

Effective July 3, 1969, revised September 3, 1969.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20SO](https://openairdocs.org/tcds/A20SO): Piper Aircraft Inc.; names 2 of 4 models: PA-31, PA-31-300

## 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: 29 (29 by airframe model, 0 by engine model)
- Makers: Piper 29

Models with the most aircraft:

- [Piper PA-31](https://openairdocs.org/model/piper-pa-31): 26 aircraft (airframe model)
- [Piper PA-31-300](https://openairdocs.org/model/piper-pa-31-300): 3 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/69-13-04/models.md
Every aircraft: https://openairdocs.org/ad/69-13-04/aircraft.md

Its text cites no advisory circulars or STCs.

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