# AD 76-18-06: Elevator Structure

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-31T
- Effective: September 10, 1976
- Published: September 2, 1976
- Issued: August 26, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2716
- Registered aircraft: 87 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F55445A0306811CC8625699E004A933C.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/76-18-06

## The airworthiness directive

76-18-06 PIPER: Amendment 39-2716. Applies to Model PA-31T, Serial Nos. 31T-7400001 through 31T-7620039 certificated in all categories.

To prevent possible hazards in flight associated with cracks in the elevator and elevator tab support structure, accomplish the following within the next fifty hours in service after the effective date of this AD unless previously accomplished.

  (a) Alter the stabilizer/elevator/elevator tab structure in accordance with Piper Elevator Hinge Modification Kit No. 761 056 or approved equivalent alteration.

  (b) Equivalent alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.

(Piper Service Bulletin No. 504 refers to this subject.)

This amendment is effective September 10, 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/76-18-06/models.md
Every aircraft: https://openairdocs.org/ad/76-18-06/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.