# AD 68-07-09: Longitudinal Control System

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 177
- Effective: November 16, 1968
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-682
- Registered aircraft: 446 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FCFFDE88D4EE445C86256A1C007495C7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/68-07-09

## The airworthiness directive

68-07-09 CESSNA: Amdt. 39-682. Applies to Model 177, Serial Numbers 177-00001 through 177-01152, aircraft.

Compliance: Required as indicated, unless already accomplished.

To prevent oscillation in the longitudinal control system, accomplish the following:

  (a) Within 10 hours' time in service after the effective date of this airworthiness directive, modify the flap system by the installation of Cessna P/N 170094-1, in accordance with the instructions contained in Cessna Service Letter No. SE68-13, dated March 30, 1968, or any other method approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Central Region.

  (b) Cessna P/N 170094-1 referred to in paragraph (a) may be removed when Cessna P/N 1709007-1 is installed in accordance with Cessna Service Letter SE68-14, operation 23 and attachments, dated April 11, 1968, as revised April 22, 1968, or when any other modification is installed which has been approved by Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Central Region.

This amendment becomes effective November 16, 1968.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A13CE](https://openairdocs.org/tcds/A13CE): Textron Aviation Inc.; names 1 of 3 models: 177

## 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: 446 (446 by airframe model, 0 by engine model)
- Makers: Cessna 446

Models with the most aircraft:

- [Cessna 177](https://openairdocs.org/model/cessna-177): 446 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/68-07-09/models.md
Every aircraft: https://openairdocs.org/ad/68-07-09/aircraft.md

Its text cites no advisory circulars or STCs.

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