# AD 54-02-02: Wheel Skis

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 170, 170A, 170B, PA-20 and 108
- Published: December 4, 1956
- Issued: December 4, 1956
- Superseded by: Nothing supersedes this AD
- Product type: Appliance
- Registered aircraft: 2,595 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/333F61C3D91A63A886256A3200699E11.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/54-02-02

## The airworthiness directive

54-02-02 FEDERAL SKIS: Applies to All Universal (Stinson) 108 and Cessna 170, 170A and 170B Airplanes Equipped With Federal Models AWB-2500 and AWB-2500A Wheel Skis and Piper PA-20 Airplanes Equipped With Federal Model AWB-2100 Wheel Skis.

Compliance required as soon as possible but not later than February 15, 1954.

To preclude the possibility of the ski dropping down against the mechanical rigger and possible subsequent damage to the aircraft structure, the rigging arrangement must be revised in accordance with Federal Aircraft Works Drawing No. 11D1077.

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-799](https://openairdocs.org/tcds/A-799): Textron Aviation Inc.; names 3 of 3 models: 170, 170A, 170B
- [TCDS 1A4](https://openairdocs.org/tcds/1A4): Piper Aircraft Inc.; names 1 of 6 models: PA-20
- [TCDS A-767](https://openairdocs.org/tcds/A-767): Univair Aircraft Corporation; names 1 of 5 models: 108

## 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: 2,595 (2,595 by airframe model, 0 by engine model)
- Makers: Cessna 2,085, Piper 276, Stinson 213, Universal Stinson 19, Consolidatedvultee Acft 2

Models with the most aircraft:

- [Cessna 170B](https://openairdocs.org/model/cessna-170b): 1,300 aircraft (airframe model)
- [Cessna 170A](https://openairdocs.org/model/cessna-170a): 513 aircraft (airframe model)
- [Piper PA-20](https://openairdocs.org/model/piper-pa-20): 276 aircraft (airframe model)
- [Cessna 170](https://openairdocs.org/model/cessna-170): 272 aircraft (airframe model)
- [Stinson 108](https://openairdocs.org/model/stinson-108): 213 aircraft (airframe model)
- [Universal Stinson 108](https://openairdocs.org/model/universal-stinson-108): 19 aircraft (airframe model)
- [Consolidatedvultee Acft 108](https://openairdocs.org/model/consolidatedvultee-acft-108): 2 aircraft (airframe model)

All 8 models: https://openairdocs.org/ad/54-02-02/models.md
Every aircraft: https://openairdocs.org/ad/54-02-02/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.