# AD 70-15-02: Fuel Quantity Indicators

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 336, 337, 337A, 337B, 337C, 337D, T337B, T337C and T337D
- Effective: July 21, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1036
- Registered aircraft: 297 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/980D1EE0B4D5334886256A340062B574.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-15-02

## The airworthiness directive

70-15-02 CESSNA: Amdt. 39-1036. Applies to Models 336 (Serial Numbers 336-0001 through 336-0195), 337, 337A, B, C and D (Serial Numbers 337-0001 through 337-1193), T337B, C and D (Serial Numbers 337-0526 through 337-1193) Airplanes.

Compliance: Required as indicated, unless already accomplished.

To prevent damage to fuel quantity indicators and the fuel tank transmitters due to overheating which can result in smoke emission in the cockpit and inaccurate fuel quantity indication, accomplish the following:

Within 50 hours' time in service after the effective date of this AD, install a cooling duct directing ram air over the fuel quantity indicators and perform a functional ground check of the fuel quantity system in accordance with the instructions contained in Cessna Service Letter No. ME70-24, dated July 7, 1970, or later FAA approved revision, or any other method approved by the Chief, Engineering & Manufacturing Branch, FAA, Central Region.

This amendment becomes effective July 21, 1970.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A6CE](https://openairdocs.org/tcds/A6CE): Textron Aviation Inc.; names 8 of 19 models: 337, T337B, 337D, 337C, T337D, 337A, T337C, 337B
- [TCDS A2CE](https://openairdocs.org/tcds/A2CE): Textron Aviation Inc.; names 1 of 1 models: 336

## 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: 297 (297 by airframe model, 0 by engine model)
- Makers: Cessna 296, Cessna Conroy 1

Models with the most aircraft:

- [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 336](https://openairdocs.org/model/cessna-336): 35 aircraft (airframe model)
- [Cessna 337C](https://openairdocs.org/model/cessna-337c): 33 aircraft (airframe model)
- [Cessna T337B](https://openairdocs.org/model/cessna-t337b): 19 aircraft (airframe model)
- [Cessna T337C](https://openairdocs.org/model/cessna-t337c): 15 aircraft (airframe model)
- [Cessna T337D](https://openairdocs.org/model/cessna-t337d): 7 aircraft (airframe model)
- [Cessna Conroy 337A](https://openairdocs.org/model/cessna-conroy-337a): 1 aircraft (airframe model)

All 10 models: https://openairdocs.org/ad/70-15-02/models.md
Every aircraft: https://openairdocs.org/ad/70-15-02/aircraft.md

Its text cites no advisory circulars or STCs.

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