Commonwealth legislation

AD/M20/41 - Aerosonic Fuel Flow Transducers - Inspection and Replacement

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive requires owners/operators of Mooney M20J and M20K aeroplanes to inspect Aerosonic fuel flow transducers for cap‑to‑body fuel leaks every 25 flight hours and to replace specified transducer part numbers or units not marked “FLO‑SCAN”; replacements must be torqued to 25–30 ft·lbs and leak‑checked. It responds to evidence that transducer caps can separate and has recorded a fuel leak that led to an engine‑compartment fire, so it creates recurring inspection and parts‑replacement duties for the affected fleet.

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AD/M20/41 - Aerosonic Fuel Flow Transducers - Inspection and Replacement

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Mooney M20 Series Aeroplanes

AD/M20/41 Aerosonic Fuel Flow Transducers - Inspection

and Replacement

Applicability: All model M20J and M20K.

10/80

Requirement: 1. Inspect all installed Aerosonic Fuel Flow Transducers for fuel leaks in the area where the transducer cap and body are bonded together.

2. (a) Replace all Aerosonic Fuel Flow Transducers P/N 33184-1 and 32622-6 (except those with the word “FLO-SCAN” marked on bottom of transducer) and install Aerosonic replacement units identified with “FLO-SCAN”, S/No. 5000 and up.

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

Note: FAA AD 80-17-04 Amdt. 39-3873 and Aerosonic Service Bulletin No. 1 and No. 2 refer.

Compliance: Inspect within 25 hours time in service after 13 October 1980 and thereafter every 25 hours time in service until replaced in accordance with para. 2 above. Transducers revealing fuel leaks in the area quoted in para. 1 above must be replaced before further flight.

Background: There is evidence to suggest that the quoted Aerosonic fuel flow transducer caps may not be properly bonded in the transducer body and may separate from the body. One instance overseas of cap separation allowed fuel leakage and resulted in an engine compartment fire.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.