# AD 74-16-06: Oil Pressure Gage Line

- Type: Airworthiness directive
- Status: Current
- Products: Cessna F177RG, 177, 177A, 177B and 177RG
- Effective: August 9, 1974
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1911
- Registered aircraft: 2,161 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F1B69FFBF43DECDE86256A3400649295.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/74-16-06

## The airworthiness directive

74-16-06 CESSNA: Amendment 39-1911. Applies to Models 177 (Serial Numbers 17700001 thru 17702041), 177RG (Serial Numbers 177RG00001 thru 177RG0445) and F177RG (Serial Numbers F177RG0001 thru F177RG0092) airplanes.

Compliance: Within the next 50 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent failure or chafing of the oil pressure gage line located between the firewall and the oil pressure gage, install clamps between the flap control cable and the oil pressure gage line in accordance with Cessna Service Letter SE74-2 dated January 25, 1974, or later approved revisions. Any alternate method of compliance must be approved by Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective August 9, 1974.

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A13CE](https://openairdocs.org/tcds/A13CE): Textron Aviation Inc.; names 3 of 3 models: 177, 177A, 177B
- [TCDS A20CE](https://openairdocs.org/tcds/A20CE): Textron Aviation Inc.; names 1 of 1 models: 177RG
- [TCDS A26EU](https://openairdocs.org/tcds/A26EU): Textron Aviation Inc.; names 1 of 1 models: F177RG

## 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: 2,161 (2,161 by airframe model, 0 by engine model)
- Makers: Cessna 2,160, Reims Aviation S A 1

Models with the most aircraft:

- [Cessna 177B](https://openairdocs.org/model/cessna-177b): 843 aircraft (airframe model)
- [Cessna 177RG](https://openairdocs.org/model/cessna-177rg): 788 aircraft (airframe model)
- [Cessna 177](https://openairdocs.org/model/cessna-177): 446 aircraft (airframe model)
- [Cessna 177A](https://openairdocs.org/model/cessna-177a): 81 aircraft (airframe model)
- [Cessna F177RG](https://openairdocs.org/model/cessna-f177rg): 2 aircraft (airframe model)
- [Reims Aviation S A F177RG](https://openairdocs.org/model/reims-aviation-s-a-f177rg): 1 aircraft (airframe model)

All 7 models: https://openairdocs.org/ad/74-16-06/models.md
Every aircraft: https://openairdocs.org/ad/74-16-06/aircraft.md

Its text cites no advisory circulars or STCs.

## NTSB investigations that cite this AD (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB IAD75FLT09](https://openairdocs.org/ntsb/IAD75FLT09), Feb 14, 1975: Cessna 177 (N34343), Jackson, TN, substantial damage

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