# AD 69-18-05: Turbocharger Lubricating Oil Scavenge Pump

- Type: Airworthiness directive
- Status: Current
- Products: Continental Motors TSIO-520-B, TSIO-520-D and TSIO-520-E
- Effective: September 4, 1969
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-835
- Registered aircraft: 4,132 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC1C42E9462A79AE8625682C006BB598.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/69-18-05

## The airworthiness directive

69-18-05 CONTINENTAL: Amdt. 39-835. Applies to Models TSIO-520-B (Serial Numbers 145001 through 145618), TSIO-520-D (Serial Numbers 156001 through 156103), and TSIO-520-E (Serial Numbers 165001 through 165493, 165496, and 165497) engines having 300 hours' or more time-in-service, except those engines having turbocharger oil scavenge pumps with P/N 635327 Shaft Gear-Starter, P/N 635328 Body- Scavenge Pump and P/N 635330 Gear-Scavenge Pump, or those engines equipped with P/N 635061-A1 Starter Adaptor and Scavenge Pump Assembly. Compliance: Unless already accomplished, within the next 100 hours' time-in-service after the effective date of this airworthiness directive, on engines having 300 or more hours' time-in-service, or at or before 400 hours' time-in-service on engines that have less than 300 hours' time-in-service at the effective date of this airworthiness directive, accomplish the following: To prevent failure of the turbocharger lubricating oil scavenge pump: Remove P/N 632597 scavenge pump drive gear and P/N MS 35756-3 Woodruff Key and replace with a P/N 636251 scavenge pump drive gear and a new P/N MS35756-3 Woodruff Key. In the P/N 632602 scavenge body assembly drill a .093 inch (3/32) diameter hole to a depth of .31 inch (5/16) in the floor of the gear cavity midway between the center of the gears. Continental Service Bulletin No. M69-8 dated June 11, 1969, refers to the above and provides additional instructions on this modification. This amendment becomes effective September 4, 1969.

## 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 3 of 31 models: TSIO-520-B, TSIO-520-D, TSIO-520-E

## 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: 4,132 (0 by airframe model, 4,132 by engine model)
- Makers: Cessna 3,195, Beech 675, Piper 173, 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-B](https://openairdocs.org/engine/continental-tsio-520-b): 9 aircraft (engine model)
- [Continental TSIO-520-E](https://openairdocs.org/engine/continental-tsio-520-e): 6 aircraft (engine model)
- [Continental TSIO-520-D](https://openairdocs.org/engine/continental-tsio-520-d): 4 aircraft (engine model)

All 5 models: https://openairdocs.org/ad/69-18-05/models.md
Every aircraft: https://openairdocs.org/ad/69-18-05/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.