# SDR CA130531015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 2013
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Aerosp ATR 42-320
- Registry model: [Aerosp ATR 42-320](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-320) (OpenAirDocs)
- Aircraft time: 20,313 hours
- Engine: Pwa PW121
- Propeller: Hamstd 14SF5
- System (JASC): [2840 · Fuel Indicating System](https://openairdocs.org/jasc/2840)
- Part: Pressure Switch
- Part number: 1153000
- Condition: Leaking
- Location: Fuel System
- Stage of operation: IN
- How discovered: 9
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA130531015

## Discrepancy

(CAN) DURING A MAINTENANCE RUN, A SUBSTANCIAL AMOUNT OF FUEL WAS OBSERVED LEAKING FOM THE INBD L/E. THE L/E WAS REMOVED AND FUEL WAS FOUND TO BE COMING FROM THE MOTIVE FLOW PRESSURE SWITCH LOCATED IN THE FORWARD WING SPAR.  A BENCH TEST WAS PERFORMED WITH COMPRESSED AIR AND THE LEAKAGE WAS DISCOVERED TO BE ORIGINATING FROM THE CASE OF THE SWITCH ASSY, UNDERNEITH THE METAL PART IDENTIFICAITON TAG.  A NEW SWITCH WAS INSTALLED AND ACFT RETURNED TO SERVICE.

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