# AD 76-03-01: Elevator Trim Tab System

- Type: Airworthiness directive
- Status: Historical
- Products: Piper Aircraft, Inc., The New PA-31T
- Effective: February 9, 1976
- Superseded by: [AD 2001-06-01](https://openairdocs.org/ad/2001-06-01)
- Product type: Aircraft, Small airplane
- Amendment: 39-2505
- Registered aircraft: 87 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/13DA4544D6FAE2638625699E004A8A84.0001
- DRS record last changed: August 7, 2025
- Page: https://openairdocs.org/ad/76-03-01

## The airworthiness directive

76-03-01 PIPER: Amendment 39-2505. Applies to Model PA-31T, Serial Numbers 31T-7400002 through 31T-7620012 certificated in all categories.

To prevent possible hazards in flight associated with excessive play in the elevator trim tab control system and damage to the elevator support structure, accomplish the following within the next fifty hours in service from the effective date of this AD unless previously accomplished.

  (a) On Serial Numbers 31T-7400002 through 31T-7620007, install Piper Kit No. 760989, Elevator Control Tube and Trim Tab System Modification, or equivalent.

  (b) On Serial Numbers 31T-7400002 through 31T-7520020, 31T-7520022 through 31T-7520038, and 31T-7520040 through 31T-7620012, inspect and alter the elevator support structure in accordance with paragraphs one through six of the "Instructions" section of Piper Service Bulletin No. 481A or equivalent.

  (c) All defective parts found during inspections in paragraphs three through five of Piper Service Bulletin No. 481A must be replaced prior to 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 parts and inspections must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (Piper Service Bulletins Numbers 477A and 481A refer to this subject.)

This amendment is effective February 9, 1976.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A8EA](https://openairdocs.org/tcds/A8EA): Piper Aircraft Inc.; names 1 of 6 models: PA-31T

## 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: 87 (87 by airframe model, 0 by engine model)
- Makers: Piper 87

Models with the most aircraft:

- [Piper PA-31T](https://openairdocs.org/model/piper-pa-31t): 87 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/76-03-01/models.md
Every aircraft: https://openairdocs.org/ad/76-03-01/aircraft.md

## Related documents

- [AD 2001-06-01](https://openairdocs.org/ad/2001-06-01): Elevator Structure · Piper PA-31, PA-31-300, PA-31-325 and 7 more. Effective May 8, 2001. Supersedes this AD

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.