# AD 47-40-02: Piston Pins

- Type: Airworthiness directive
- Status: Current
- Products: Continental Motors C-125-1, C-125-2, C75-12F, C75-12FH, C75-12FJ, C85-12F and C85-12FJ
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Registered aircraft: 5,088 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A5193EF086EC97B88625682C005A685B.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-40-02

## The airworthiness directive

47-40-02 CONTINENTAL: (Was Mandatory Note of Airworthiness Directive Supplement Dated October 3, 1947.) Applies Only to the Following Models: Cessna 120 and 140, Commonwealth (Rearwin) 185, Superior (Culver) V and V2, Air Products (Erco) 415C, McClish (Funk) B85C, Universal (Globe) GC-1A, GC-1B, Silvaire (Luscombe) 8E, and Piper J3C-65, J4E, J5A Having Continental C75-12 or -12F Engines With Serial Numbers Below 1794-6-12 Except 1788-6-12: Airplanes Having Continental C85-12, -12F or -12FHJ Engines With Serial Numbers Below 20668-6-12 Except: 20656-6-12, 20658-6-12, 20659-6-12, 20661-6-12, and 20666- 6-12; Airplanes Having Continental C125-1 or -2 Engines With Serial Numbers Below 1046-6-12 Except: 1034- 6-12, 1037-6-12 Through 1042-6-12, and 1044-6-12. Compliance required immediately if engine has attained or passed 600-hour major overhaul period, but in any event not later than December 31, 1947, or 600 hours of operation, whichever occurs first. A certain percentage of piston pins installed in engines of the above numbers and distributed as replacement parts are subject to failure without warning. The weakness of these pins cannot be detected by normal inspection methods. Piston pin breakage can result in complete engine failure. It is the owner's responsibility to avoid this risk by making the following change at the earliest possible time. Replace piston pin assembly No. 22248-A1 (0.6875-inch inside diameter) with thick wall piston pin assembly No. 25121-A1 or 25262-A1 (0.5945-inch inside diameter). Supplies of the heavy wall pins are adequate so that immediate replacement can be effected. (Continental Service Bulletin No. M47-9 covers this same subject.)

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E-233](https://openairdocs.org/tcds/E-233): Continental Aerospace Technologies, Inc.; names 5 of 31 models: C85-12F, C85-12FJ, C75-12F, C75-12FH, C75-12FJ
- [TCDS E-236](https://openairdocs.org/tcds/E-236): Continental Aerospace Technologies, Inc.; names 2 of 4 models: C-125-1, C-125-2

## 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: 5,088 (0 by airframe model, 5,088 by engine model)
- Makers: Cessna 1,868, Piper 722, Aeronca 542, Luscombe 331, Ercoupe 316, Globe 235, Engineering & Research 190, Taylorcraft 99, Commonwealth 72, Champion 63

Models with the most aircraft:

- [Continental C85 series](https://openairdocs.org/engine/continental-c85-series): 4,671 aircraft (engine model)
- [Continental C125 series](https://openairdocs.org/engine/continental-c125-series): 322 aircraft (engine model)
- [Continental C85-12F](https://openairdocs.org/engine/continental-c85-12f): 90 aircraft (engine model)
- [Continental C75-12F](https://openairdocs.org/engine/continental-c75-12f): 3 aircraft (engine model)
- [Continental C-125-2](https://openairdocs.org/engine/continental-c-125-2): 2 aircraft (engine model)

All 5 models: https://openairdocs.org/ad/47-40-02/models.md
Every aircraft: https://openairdocs.org/ad/47-40-02/aircraft.md

Its text cites no advisory circulars or STCs.

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