# AD 58-23-03: Aileron Counterbalance Brace

- Type: Airworthiness directive
- Status: Current
- Products: Mooney M20
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 23 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/49275D130692D57F86256A3A0071471C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/58-23-03

## The airworthiness directive

58-23-03 MOONEY: Applies to Model M-20 Aircraft Serial Numbers 1002 Through 1051. Compliance required as soon as practicable but not later than December 15, 1958. Several failures of the aileron counterbalance buttweld at the aileron spar have occurred. The affected airplanes do not have a 3/8 inch O.D. x 0.028 inch x 3 inch steel reinforcing brace installed. It must be determined whether this brace has been incorporated. If not, the following inspection and repair must be accomplished: 1. Remove the paint from the subject welded joint and inspect for cracks. 2. Reweld the joint if cracks are present. 3. Install the 3/8 inch O.D. x 0.028 inch x 3 inch 4130 steel tubular brace (trimmed to fit). (Mooney Aircraft, Inc. Service Letter 20-7 Revision B covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 1 of 17 models: M20

## 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: 23 (23 by airframe model, 0 by engine model)
- Makers: Mooney 23

Models with the most aircraft:

- [Mooney M20](https://openairdocs.org/model/mooney-m20): 23 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/58-23-03/models.md
Every aircraft: https://openairdocs.org/ad/58-23-03/aircraft.md

Its text cites no advisory circulars or STCs.

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