# AD 76-15-07: Elevator Balance Weights

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-31-325 and PA-31-350
- Effective: August 3, 1976
- Published: July 29, 1976
- Issued: July 20, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2680
- Registered aircraft: 536 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/16BCF4FAF7ECA56E8625699E004A90EF.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/76-15-07

## The airworthiness directive

76-15-07 PIPER: Amendment 39-2680. Applies to Models PA-31-325, Serial Nos. 31-7400990, 31-7512006 through 31-7512058; PA-31-350, Serial Nos. 31-5001 through 31-7552108 certificated in all categories.

To prevent possible hazards in flight associated with loose elevator balance weights, accomplish the following within the next fifty hours in service from the effective date of this AD unless previously accomplished:

a. Alter the elevator balance weight attachment in accordance with Piper Elevator Balance Weight Modification Kits No. 761 040 applicable to Model PA-31-325 or No. 761 041 applicable to Model PA-31-350 or approved equivalent alterations.

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

(Piper Service Bulletin Number 500 refers to this subject).

This amendment is effective August 3, 1976.

## 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-31-325, PA-31-350

## 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: 536 (536 by airframe model, 0 by engine model)
- Makers: Piper 536

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)

All 2 models: https://openairdocs.org/ad/76-15-07/models.md
Every aircraft: https://openairdocs.org/ad/76-15-07/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.