# AD 79-14-02: Control Wheel Shaft Stud

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-31, PA-31-300, PA-31-325, PA-31-350, PA-31P, PA-31T and PA-31T1
- Effective: July 6, 1979
- Published: July 5, 1979
- Issued: June 22, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3510
- Registered aircraft: 756 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/46A2EC15536887998625699E004AF424.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/79-14-02

## The airworthiness directive

79-14-02 PIPER: Amendment 39-3510. Applies to Models PA-31, PA-31-300, PA-31-325 Serial Nos. 31-5 through 31-7912059; Model PA-31-350, Serial Nos. 31-5001 through 31- 7952111; Model PA-31P, Serial Nos. 31P-1 through 31P-7730012; Model PA-31T, Serial Nos. 31T-7400002 through 31T-7920060; and Model PA-31T1, Serial Nos. 31T-7804001 through 31T-7904033 certificated in all categories.

To avoid possible separation of the control wheel control shaft stud from the control shaft tube due to the absence of two roll pins, and subsequent loss of aileron control of the affected control wheel, accomplish the following within the next 5 hours in service unless previously accomplished on the pilot and co-pilot control wheel assemblies:

a. Secure control wheels in aft position.

b. Gain access to the control shaft tube assembly (P/N 42939-00) and to stud (P/N 42938-00) connection, located just aft of the control wheel stop collar (P/N 40950-00).

c. Inspect the forward end of the control shaft tube assembly (P/N 42939-00) to determine if two roll pins (P/N 480732) are installed.

d. If one or both roll pins are missing, install as required, roll pin Piper P/N 480732, prior to further flight.

Piper Service Bulletin No. 651 refers to this subject.

This amendment is effective July 6, 1979, except as to recipients of the distribution dated May 3, 1979, which was effective upon receipt.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20SO](https://openairdocs.org/tcds/A20SO): Piper Aircraft Inc.; names 4 of 4 models: PA-31, PA-31-325, PA-31-300, PA-31-350
- [TCDS A8EA](https://openairdocs.org/tcds/A8EA): Piper Aircraft Inc.; names 3 of 6 models: PA-31T, PA-31T1, PA-31P

## 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: 756 (756 by airframe model, 0 by engine model)
- Makers: Piper 756

Models with the most aircraft:

- [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350): 399 aircraft (airframe model)
- [Piper PA-31-325](https://openairdocs.org/model/piper-pa-31-325): 137 aircraft (airframe model)
- [Piper PA-31T](https://openairdocs.org/model/piper-pa-31t): 87 aircraft (airframe model)
- [Piper PA-31T1](https://openairdocs.org/model/piper-pa-31t1): 64 aircraft (airframe model)
- [Piper PA-31P](https://openairdocs.org/model/piper-pa-31p): 40 aircraft (airframe model)
- [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 7 models: https://openairdocs.org/ad/79-14-02/models.md
Every aircraft: https://openairdocs.org/ad/79-14-02/aircraft.md

Its text cites no advisory circulars or STCs.

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