# AD 75-27-08: Torque Tube Bearing Fittings

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30 and PA-39
- Effective: June 3, 1976
- Published: June 1, 1976
- Issued: May 20, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2624
- Registered aircraft: 3,192 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/22A9EAF2D28B7FA786256E120049911F.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/75-27-08

## The airworthiness directive

75-27-08 PIPER: Amendment 39-2481 as amended by Amendment 39-2624. Applies to Models PA-24, PA-24-250 and PA-24-260, Serial Nos. 24-1 through 24-5047; PA-24-400, Serial Nos. 26-2 through 26-148; PA-30, Serial Nos. 30-1 through 30-2000; PA-39, Serial Numbers 39- 1 through 39-155, certificated in all categories.

Compliance required as indicated.

To prevent possible hazards in flight associated with damaged rivets which attach the stabilator torque tube bearing support fittings P/Ns 20420-00, -01 and 20419-00, -01 to the aft fuselage, accomplish the following;

  (a) Within the next 50 hours in service from the effective date of this AD unless previously accomplished, inspect in accordance with paragraph (b).

  (b) Inspect each of the four stabilator torque tube bearing block attachment fittings that do not have Piper Kit 760835 or equivalent incorporated, as follows:

  (1) Remove the right rear aft fuselage access door.

  (2) Using a light and mirror (with extension), view through the access opening to determine if any of the horizontally positioned rivets through the skin align with any of the vertically positioned rivets through the support fittings.

  (c) If more than one rivet is so aligned and there is a penetration of more than one of five forward vertical rivets, Piper Kit 760835 or equivalent shall be installed in the affected fitting before further flight, except that the airplane may be flown in accordance with FAR 21-197 to a base where a repair can be made.

  (d) Equivalent repairs must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (Piper Service Bulletin No. 464A, refers to this subject.)

Amendment 39-2481 was effective December 31, 1975.

This amendment 39-2624 is effective June 3, 1976.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A15](https://openairdocs.org/tcds/1A15): Piper Aircraft Inc.; names 4 of 4 models: PA-24, PA-24-260, PA-24-250, PA-24-400
- [TCDS A1EA](https://openairdocs.org/tcds/A1EA): Piper Aircraft Inc.; names 2 of 3 models: PA-30, PA-39

## 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: 3,192 (3,192 by airframe model, 0 by engine model)
- Makers: Piper 3,192

Models with the most aircraft:

- [Piper PA-24-250](https://openairdocs.org/model/piper-pa-24-250): 1,222 aircraft (airframe model)
- [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 878 aircraft (airframe model)
- [Piper PA-24-260](https://openairdocs.org/model/piper-pa-24-260): 590 aircraft (airframe model)
- [Piper PA-24](https://openairdocs.org/model/piper-pa-24): 345 aircraft (airframe model)
- [Piper PA-39](https://openairdocs.org/model/piper-pa-39): 82 aircraft (airframe model)
- [Piper PA-24-400](https://openairdocs.org/model/piper-pa-24-400): 75 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/75-27-08/models.md
Every aircraft: https://openairdocs.org/ad/75-27-08/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.