58-23-03: Aileron Counterbalance Brace
FAA order 58-23-03 is an airworthiness directive. The FAA's subject line: Aileron Counterbalance Brace. It names Mooney M-20: about 6,246 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: flight controls.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Mooney Aviation Company Inc
- Models
- M20
- On this site
- Mooney M-20 6,246 registered
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (799 characters)
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.)
Related safety bulletins advice on the same designs, not orders
2023-03-032023-02 · Landing Gear System
2014-03-14CE-14-12 · Landing Gear System
2013-05-09NE-13-32 · Propeller Spinner Section
2009-07-07CE-09-38 · Wings: Installation of Supplemental Type Certificate (STC) Wing Tip Fairings
2009-02-11CE-09-12 · Navigation: CRS/BARO Knob Interference in some G1000/G900X/G950 Installations
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/58-23-03.json · aircraft systems.