# AD 70-10-06: Oil Pressure Instrument Line

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 172I and 172K
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1008
- Registered aircraft: 1,379 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2DA19BC12EA0898686256E01005AC6B1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-10-06

## The airworthiness directive

70-10-06 CESSNA: Amendment 39-990 as amended by Amendment 39-1008. Applies to Models 172I (Serial Numbers 17256513 through 17257161) and 172K (Serial Numbers 17256493, and 17257162 through 17259043) Airplanes.

Compliance: Required as indicated, unless already accomplished.

To prevent the loss of engine oil caused by failure of the metal oil pressure instrument line, accomplish the following:

Within 50 hours' time in service from June 1, 1970, but by no later than June 30, 1970, replace the metal oil pressure instrument line between the engine and the firewall with a flexible hose assembly in accordance with the instructions contained in Cessna Service Letter No. SE70-10, dated May 5, 1970, or Cessna Service Letter No. SE70-10, Supplement No. 1, dated June 9, 1970, or any other method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

Amendment 39-990 effective May 19, 1970.

This amendment becomes effective upon publication in the FEDERAL REGISTER.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 2 of 18 models: 172K, 172I

## 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: 1,379 (1,379 by airframe model, 0 by engine model)
- Makers: Cessna 1,379

Models with the most aircraft:

- [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 aircraft (airframe model)
- [Cessna 172I](https://openairdocs.org/model/cessna-172i): 353 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/70-10-06/models.md
Every aircraft: https://openairdocs.org/ad/70-10-06/aircraft.md

Its text cites no advisory circulars or STCs.

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