# SDR WRNA201408200018

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2014
- Submitted: August 20, 2014
- Operation: Air carrier
- Aircraft: N953AR
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48520
- Aircraft time: 63,437 hours, 16,303 cycles
- System (JASC): [2410 · Alternator-Generator Drive](https://openairdocs.org/jasc/2410)
- Part: Transformer
- Part number: 749863
- Condition: Malfunctioned
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WRNA201408200018

## Discrepancy

THE CREW REPORTED THAT DURING CRUISE FLIGHT, APPROXIMATELY 50 MINUTES AFTER TAKEOFF,  A LEVEL 2 ALERT OF A GENERATOR  BUSS 3 FAULT WAS DISPLAYED IN THE EAD.   FOLLOWED QRH PROCEDURES, DEPLOYED THE ADG AND NO FUEL DUMP WAS PERFORMED. RETURNED TO DEPARTURE WITHOUT FURTHER INCIDENT.  R & R DIFFERENTIAL PROTECTION CURRENT TRANSFORMERS, T1-9071, T1-9074 & T1- 9080.  GROUND OPS NORMAL.  SYSTEM CHECKED OK.

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