# SDR CA121022009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2012
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Boeing 747-8
- Registry model: [Boeing 747-8](https://openairdocs.org/model/boeing-747-8) (OpenAirDocs)
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: B-Nut
- Condition: Loose
- Location: Apu Fuel
- Stage of operation: TX
- How discovered: O
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA121022009

## Discrepancy

(CAN) THE RECENTLY DELIVERED FREIGHTER SUFFERED AN APU AUTO SHUTDOWN FOLLOWED BY ABORTED RE-START. TROUBLESHOOTING LED TO THE DISCOVERY OF A FUEL LEAK IN THE APU COMPARTMENT CAUSED BY LOOSE B-NUTS ON THE APU FLOW DIVIDER/DUMP VALVE.  TIGHTENING THE CONNECTIONS SOLVED THE PROBLEM.  MFG IS CURRENTLY WORKING WITH THE OPERATOR ON THIS ISSUE.

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