# AD 80-17-04: Fuel Flow Transducers

- Type: Airworthiness directive
- Status: Current
- Products: Aerosonic Fuel Flow Transducers, PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P), 335, 340A, 402B, 404, 414A, 421C, M20J and M20K
- Effective: August 13, 1980
- Superseded by: Nothing supersedes this AD
- Product type: Appliance
- Amendment: 39-3873
- Registered aircraft: 3,691 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E1F34D79293EAFF186256A3400620135.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/80-17-04

## The airworthiness directive

80-17-04 AEROSONIC CORPORATION: Amendment 39-3873. Applies to all Aerosonic Fuel Flow Transducers, Part Numbers 33184-1 and 32622-6, installed on, but not limited to, Cessna Models 335, 340A, 402B, 404, 414A, and 421C; Mooney Aircraft Corporation Models M20J and M20K; and Piper Aircraft Aerostar Models 600, 601, and 601P airplanes certificated in all categories.

Compliance is required as indicated unless already accomplished.

To prevent possible fuel leakage, accomplish the following within the next 25 hours time in service after the effective date of this AD:

  (a) Inspect for installation of Aerosonic Fuel Flow Transducers Part Numbers 33184-1 or 32622-6 (name plate has part number identification). If the Transducers(s) is identified with the word "FLO-SCAN" on the bottom, or is identified with an Aerosonic part number other than 33184-1 or 32622-6, or any other manufacturer's part number the unit(s) is acceptable.

  (b) Remove Aerosonic Fuel Flow Transducers, Part Numbers 33184-1 and 32622-6 (except "FLO-SCAN) identified in paragraph (a) and reinstall Aerosonic replacement units identified with "FLO-SCAN", Serial Numbers 5000 and up.

  (c) Accomplish the following in accordance with Aerosonic Service Bulletin No. 1 dated June 30, 1980, or Service Bulletin No. 2 dated June 26, 1980, as applicable:

  (1) Torque fittings to 25-30 ft. lbs.

  (2) Perform a system leak check.

  (d) Make an appropriate entry in the aircraft maintenance record.

An equivalent method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region.

This amendment becomes effective August 13, 1980.

## Affected data sheets (5) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A17WE](https://openairdocs.org/tcds/A17WE): Aerostar Aircraft Corporation; names 3 of 5 models: PA-60-601P (Aerostar 601P), PA-60-601 (Aerostar 601), PA-60-600 (Aerostar 600)
- [TCDS A7CE](https://openairdocs.org/tcds/A7CE): Textron Aviation Inc.; names 3 of 16 models: 421C, 402B, 414A
- [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 2 of 17 models: M20K, M20J
- [TCDS 3A25](https://openairdocs.org/tcds/3A25): Textron Aviation Inc.; names 2 of 11 models: 335, 340A
- [TCDS A25CE](https://openairdocs.org/tcds/A25CE): Textron Aviation Inc.; names 1 of 2 models: 404

## 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: 3,691 (3,691 by airframe model, 0 by engine model)
- Makers: Mooney 2,179, Cessna 1,503, Piper 9

Models with the most aircraft:

- [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1,408 aircraft (airframe model)
- [Mooney M20K](https://openairdocs.org/model/mooney-m20k): 771 aircraft (airframe model)
- [Cessna 340A](https://openairdocs.org/model/cessna-340a): 543 aircraft (airframe model)
- [Cessna 421C](https://openairdocs.org/model/cessna-421c): 496 aircraft (airframe model)
- [Cessna 414A](https://openairdocs.org/model/cessna-414a): 363 aircraft (airframe model)
- [Cessna 402B](https://openairdocs.org/model/cessna-402b): 49 aircraft (airframe model)
- [Cessna 335](https://openairdocs.org/model/cessna-335): 26 aircraft (airframe model)
- [Cessna 404](https://openairdocs.org/model/cessna-404): 26 aircraft (airframe model)
- [Piper PA-60-601P](https://openairdocs.org/model/piper-pa-60-601p): 9 aircraft (airframe model)

All 11 models: https://openairdocs.org/ad/80-17-04/models.md
Every aircraft: https://openairdocs.org/ad/80-17-04/aircraft.md

Its text cites no advisory circulars or STCs.

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