# AD 84-25-05: Turbocharger Oil Scavenge Reservoir

- Type: Airworthiness directive
- Status: Current
- Products: Continental Motors TSIO-520-BE
- Effective: March 4, 1985
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-5002
- Registered aircraft: 4,122 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/785DC639C873B54686256840006CA54E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/84-25-05

## The airworthiness directive

84-25-05 TELEDYNE CONTINENTAL MOTORS: Amendment 39-5002. Applies to Teledyne Continental Motor Model TSIO-520BE engines S/N's 528001 through 528125 and 528138 equipped with turbocharger oil scavenge reservoir P/N's 646691 and 646692. Compliance is required as indicated unless already accomplished. To prevent the loss of engine oil, within the next 5 hours time in service, and thereafter at intervals not to exceed 10 hours time in service, until P/N 646954 and P/N 646955 are installed: (a) Visually inspect the turbocharger oil scavenge reservoir P/N's 646691 and 646692 for any indication of cracks, deformation, or oil leaks at, or near, all weld beads. If any crack, deformation, or oil leak is found, replace defective part with a serviceable reservoir. (b) Serviceable P/N's 646691 and/or 646692 may be used while continuing to inspect the turbocharger oil scavenge reservoir every 10 hours time in service, until P/N 646954 and P/N 646955 are installed. NOTE: Piper Aircraft Telex Service Bulletin No.790 refers to this subject. Aircraft may be ferried in accordance with the provisions of Federal Aviation Regulations (FARs) 21.197 and 21.199 to a base where the AD can be accomplished. Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Atlanta Aircraft Certification Office, 1075 Inner Loop Road, College Park, Georgia 30337; telephone (404) 763-7435. This amendment becomes effective March 4, 1985, to all persons except those persons to whom it was made immediately effective by 1984.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E8CE](https://openairdocs.org/tcds/E8CE): Continental Aerospace Technologies, Inc.; names 1 of 31 models: TSIO-520-BE

## 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: 4,122 (0 by airframe model, 4,122 by engine model)
- Makers: Cessna 3,179, Beech 672, Piper 182, Raytheon 61, Mooney 11, Meyers Industries 2, Navion 2, Ryan 2, Aero Commander 1, Cirrus Design 1

Models with the most aircraft:

- [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series): 4,064 aircraft (engine model)
- [TCM Cont TSIO-520 series](https://openairdocs.org/engine/tcm-cont-tsio-520-series): 49 aircraft (engine model)
- [Continental TSIO-520-BE](https://openairdocs.org/engine/continental-tsio-520-be): 9 aircraft (engine model)

All 3 models: https://openairdocs.org/ad/84-25-05/models.md
Every aircraft: https://openairdocs.org/ad/84-25-05/aircraft.md

Its text cites no advisory circulars or STCs.

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