# AD 74-22-04: Crankcase

- Type: Airworthiness directive
- Status: Current
- Products: Continental Motors 6-285-B
- Effective: October 28, 1974
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-1998
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/662AC87AF3F99FCF8625682C006E1422.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/74-22-04

## The airworthiness directive

74-22-04 TELEDYNE CONTINENTAL MOTORS: Amendment 39-1998. Applies to TCM Model 6-285- B engines with engine serial numbers 700000 through 700095. Compliance required within the next 25 hours time in service after the effective date of this AD unless already accomplished. Inspect the crankcase main bearing oil supply passages in accordance with procedures outlined in Teledyne Continental Service Bulletin M74-21. After compliance with this bulletin, if it is determined that an oil passage has been omitted the engine must be removed from service. This amendment becomes effective October 28, 1974.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E12CE](https://openairdocs.org/tcds/E12CE): Continental Aerospace Technologies, Inc.; names 1 of 5 models: 6-285-B

## 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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