# AD 56-27-03: Aileron Balance Weight Bracket

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-23
- Published: April 11, 1957
- Issued: April 11, 1957
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 155 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6F2E1389202EA568625698B00764B4A.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/56-27-03

## The airworthiness directive

56-27-03 PIPER: Applies to Model PA-23, Serial Numbers 23-1 Through 23-800 Except 23-732, 23-736, 23-739, 23-740, 23-741, 23-769, 23-777, 23-784, 23-787, 23-794, 23-797 and 23-799.

Compliance required by February 1, 1957.

In order to prevent fatigue cracking in the aileron balance weight bracket at a point where the bracket tubes are welded to form a 90 degree angle, it will be necessary to remove both the right and left aileron balance weight brackets and reinforce them with gussets, Piper P/N 17126- 07 in accordance with the instructions and sketch contained in Piper Service Bulletin No. 149 dated December 10, 1956.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A10](https://openairdocs.org/tcds/1A10): Piper Aircraft Inc.; names 1 of 6 models: PA-23

## 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: 155 (155 by airframe model, 0 by engine model)
- Makers: Piper 155

Models with the most aircraft:

- [Piper PA-23](https://openairdocs.org/model/piper-pa-23): 155 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/56-27-03/models.md
Every aircraft: https://openairdocs.org/ad/56-27-03/aircraft.md

Its text cites no advisory circulars or STCs.

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