# SDR QMLA2011022511029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2011
- Submitted: February 28, 2011
- Operation: Air carrier
- Aircraft: N520CF
- Make and model: Urocop AS365N3
- Registry model: [Urocop AS365N3](https://openairdocs.org/model/eurocopter-as365n3) (OpenAirDocs)
- Aircraft serial: 6537
- Aircraft time: 2,739 hours, 14,730 cycles
- Engine: Tmeca ARRIEL2C
- Engine time: 2,705 hours, 8,505 cycles
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: B-Nut
- Condition: Leaking
- Location: Engine Fuel
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2011022511029

## Discrepancy

THE PILOT SMELLED FUEL IN THE COCKPIT SHORTLY AFTER TAKEOFF.  IMMEDIATELY RETURNED TO THE BASE AND HAD MECHANIC INSPECT THE AIRCRAFT.  MECHANIC DID FIND A LOOSE B-NUT THAT WAS LEAKING ON THE FUEL RETURN LINE FOR THE NR 2 ENGINE.  THE MECHANIC TIGHTENED THE B-NUT, PERFORMED A GROUND RUN TO CHECK FOR LEAKS.  NO FURTHER LEAKS OR ODORS WERE DETECTED AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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