# AD 62-26-06: Exhaust System

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-28-150 and PA-28-160
- Effective: December 14, 1962
- Published: December 8, 1962
- Issued: November 30, 1962
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 376 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F7F08CC6FD2F9C61862569970057EFD9.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/62-26-06

## The airworthiness directive

62-26-06 PIPER: Amdt. 516 Part 507 Federal Register December 8, 1962. Applies to All Models PA-28-150 and PA-28-160 Airplanes With Serial Numbers 28-03, 28-1 through 28-671, 28-678, 28-679, 28-681, 28-685, 28-690, 28-691, 28-693, 28-697, 28-706, and 28-707, Except Those With Exhaust Assembly P/N 63726 Installed.

Compliance required within the next 10 hours' time in service after the effective date of this AD, and each 50 hours' time in service thereafter.

There have been cracks found in the exhaust system on Piper PA-28-150 and PA-28-160 airplanes. As this condition is likely to occur in other airplanes of the same type design, accomplish the following:

  (a) Remove carburetor heat muff shroud and conduct a close visual inspection of the complete exhaust system piping for cracks in all welded joints and tubing bends. Pay particular attention to the area near the junction of the cylinder stacks and main exhaust manifold.

  (b) If cracks are found, repair by gaswelding. (The exhaust pipe is AISI 321 or 347 corrosion resistant steel.)

(Piper Service Letter 389 covers this same subject.)

This directive effective December 14, 1962.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2A13](https://openairdocs.org/tcds/2A13): Piper Aircraft Inc.; names 2 of 18 models: PA-28-150, PA-28-160

## 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: 376 (376 by airframe model, 0 by engine model)
- Makers: Piper 376

Models with the most aircraft:

- [Piper PA-28-160](https://openairdocs.org/model/piper-pa-28-160): 253 aircraft (airframe model)
- [Piper PA-28-150](https://openairdocs.org/model/piper-pa-28-150): 123 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/62-26-06/models.md
Every aircraft: https://openairdocs.org/ad/62-26-06/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.