# AD 71-18-02: Counterweight Assembly

- Type: Airworthiness directive
- Status: Current
- Products: McCauley Propeller Systems 2AF34C55
- Effective: August 31, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Propeller
- Amendment: 39-1274
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F048790C811D4C3C86256965006E6896.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/71-18-02

## The airworthiness directive

71-18-02 MCCAULEY: Amdt. 39-1274. Applies to Model 2AF34C55, 2AF34C55-A, B, C, D, E, F, G, H, HM, J, JM, K, KM, L, LM, M and N propellers.

Compliance required as indicated, unless already accomplished.

To prevent propeller counterweight assembly failures accomplish the following:

  (a) Propellers with 750 hours or more time in service as of the effective date of this airworthiness directive must be modified in accordance with paragraph (c) within the next 100 hours time in service.

  (b) Propellers with less than 750 hours in service as of the effective date of this airworthiness directive must be modified in accordance with paragraph (c) prior to the accumulation of 850 hours in service.

  (c) Modify propeller counterweight assembly in accordance with McCauley Service Bulletin Nos. 93 dated 21 April 1971 and 93-1 dated 30 June 1971 or later FAA approved revision or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, Eastern Region.NOTE: McCauley Service Bulletin 93-2 lists serial numbers of 2AF34C55N propeller hub assemblies which were in compliance with this airworthiness directive when shipped from the manufacturer.

This amendment is effective August 31, 1971.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS P5EA](https://openairdocs.org/tcds/P5EA): McCauley Propeller Systems; names 1 of 3 models: 2AF34C55

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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