# AD 71-17-08: Rear Engine Stoppage On Take Off

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 337, 337A, 337B, 337C, 337D, 337E, 337F, 337G and 337H
- Effective: August 24, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1273
- Registered aircraft: 371 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6BDDAFB3E72BE07086256A340062EA4D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/71-17-08

## The airworthiness directive

71-17-08 CESSNA: Amdt. 39-1273. Applies to Model 337 Airplanes.

Compliance. To minimize the possible adverse affects of undetected rear engine stoppage during take-off, within the next 10 hours' time in service after the effective date of this AD, the following modifications must be accomplished and the following operational procedures will be applicable:

A) Readjust the rear engine idle RPM from 575-625 to 625-675 and readjust idle mixture accordingly.

B) Taxi primarily by use of the rear engine.

C) Initiate all take-offs by advancing the throttle on the rear engine to a point where the normal functioning of the rear engine has been established before advancing the throttle of the front engine.

D) Install a permanent placard to the right of the tachometer instrument to read as follows:

TAXI AND TAKE-OFF LEAD WITH REAR ENGINE POWER CHECK RPM AND FUEL FLOW

NOTE: The operator may make and install a temporary placard using minimum 1/8 inch highletters until the permanent placard is obtained from the manufacturer and properly installed.

Cessna Service Letter ME 71-21 refers to the subject matter of this AD.

This amendment becomes effective August 24, 1971.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A6CE](https://openairdocs.org/tcds/A6CE): Textron Aviation Inc.; names 9 of 19 models: 337, 337D, 337G, 337H, 337F, 337C, 337A, 337E…

## 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: 371 (371 by airframe model, 0 by engine model)
- Makers: Cessna 370, Cessna Conroy 1

Models with the most aircraft:

- [Cessna 337G](https://openairdocs.org/model/cessna-337g): 96 aircraft (airframe model)
- [Cessna 337A](https://openairdocs.org/model/cessna-337a): 55 aircraft (airframe model)
- [Cessna 337](https://openairdocs.org/model/cessna-337): 50 aircraft (airframe model)
- [Cessna 337D](https://openairdocs.org/model/cessna-337d): 42 aircraft (airframe model)
- [Cessna 337B](https://openairdocs.org/model/cessna-337b): 40 aircraft (airframe model)
- [Cessna 337C](https://openairdocs.org/model/cessna-337c): 33 aircraft (airframe model)
- [Cessna 337F](https://openairdocs.org/model/cessna-337f): 24 aircraft (airframe model)
- [Cessna 337E](https://openairdocs.org/model/cessna-337e): 21 aircraft (airframe model)
- [Cessna 337H](https://openairdocs.org/model/cessna-337h): 9 aircraft (airframe model)
- [Cessna Conroy 337A](https://openairdocs.org/model/cessna-conroy-337a): 1 aircraft (airframe model)

All 10 models: https://openairdocs.org/ad/71-17-08/models.md
Every aircraft: https://openairdocs.org/ad/71-17-08/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.