# AD 78-13-06: Main Landing Gear Wheel Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-31T
- Effective: June 29, 1978
- Published: June 29, 1978
- Issued: June 15, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3248
- Registered aircraft: 87 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8115158B847095058625699E004ADD05.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/78-13-06

## The airworthiness directive

78-13-06 PIPER AIRCRAFT CORPORATION: Amendment 39-3248. Applies to PA-31T type aircraft certificated in all categories, equipped with Cleveland main landing gear wheel assembly, Piper P/N 551775, Cleveland P/N 40-106.

To detect cracks in the main landing gear wheel brakes, accomplish the following:

  (a) Prior to the next flight, visually check the weld joining the brake disc to the cup for circumferential cracks. If a crack is found, replace the disc with an airworthy part of the same P/N or with Cleveland brake disc, P/N 164-39F, before further flight. Check may be accomplished by the pilot.

  (b) Repeat paragraph (a) prior to each flight until Cleveland P/N 164-39F is installed.

  (c) Record results of each check in aircraft log or continuous inspection manual.

This amendment is effective June 29, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A8EA](https://openairdocs.org/tcds/A8EA): Piper Aircraft Inc.; names 1 of 6 models: PA-31T

## 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: 87 (87 by airframe model, 0 by engine model)
- Makers: Piper 87

Models with the most aircraft:

- [Piper PA-31T](https://openairdocs.org/model/piper-pa-31t): 87 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/78-13-06/models.md
Every aircraft: https://openairdocs.org/ad/78-13-06/aircraft.md

Its text cites no advisory circulars or STCs.

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