# AD 46-36-03: Muffler Brace

- Type: Airworthiness directive
- Status: Current
- Products: FS 2003 PA-12
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 1,242 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8CAEF55C0831915D8625698B00763761.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/46-36-03

## The airworthiness directive

46-36-03 PIPER: (Was Mandatory Note 2 of AD-780-3.) Applies Only to PA-12 Aircraft Serial Numbers 12-1 to 12-285, Inclusive.

Compliance required not later than next periodic inspection.

To prevent possible failure of the tailpipe and cracking of the muffler, install the additional brace tube, Piper P/N 10860 and new clamp, P/N 80002-28. The new brace will form, together with the original brace, a "V" instead of a single leg. A careful inspection of the muffler should be made and if any cracks are present, a new muffler should be installed.

(Piper Service Bulletin No. 92 dated August 7, 1946, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-780](https://openairdocs.org/tcds/A-780): FS 2003 Corp.; names 1 of 2 models: PA-12

## 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: 1,242 (1,242 by airframe model, 0 by engine model)
- Makers: Piper 1,242

Models with the most aircraft:

- [Piper PA-12](https://openairdocs.org/model/piper-pa-12): 1,242 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/46-36-03/models.md
Every aircraft: https://openairdocs.org/ad/46-36-03/aircraft.md

Its text cites no advisory circulars or STCs.

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