# SDR TAMF20200901001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 2020
- Submitted: September 1, 2020
- Operation: Air carrier
- Aircraft: [N331QT](https://openairdocs.org/aircraft/N331QT), registered now
- Make and model: Airbus A330-243F
- Registry model: [Airbus A330-243F](https://openairdocs.org/model/airbus-a330-243f) (OpenAirDocs)
- Aircraft serial: 1380
- Aircraft time: 28,589 hours, 9,014 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil Cooler
- Part number: 38811411
- Part serial: 1914
- Condition: Faulty
- Location: Apu
- Part time: 6,979 hours, 17,864 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TAMF20200901001

## Discrepancy

DURING FLIGHT, THE "APU FAULT" MESSAGE WAS SHOWN AT ECAM SYSTEM DISPLAY, THE ELECTRICAL GENERATOR NO 1 HAD BEEN DEFERRED (MEL 24-22-01) AND THEREFORE THE AIRCRAFT RETURNED FROM FLIGHT. DURING THE MAINTENANCE ACTIONS AND ACCORDING TO THE TROUBLESHOOTING TSM TASK 49-62-00-810-815-A.  THE APU OIL COOLER WAS FOUND DEFECTIVE AND IT WAS REPLACED AND THE TEST WAS SATISFACTORY IAW AMM 49-91-44-000-801-A AND AMM 49-91-44-400-801-A. THE ELECTRICAL GENERATOR NR 1 WAS REMOVED AND REPLACED AND THE TEST WAS SATISFACTORY IAW AMM 24-21-51-000-804-A,  AMM 24-21-51-400-804-A AND AMM 24-21-00-710-809.

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