# SDR UALA2011072503762

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2011
- Submitted: August 17, 2011
- Operation: Air carrier
- Aircraft: [N406UA](https://openairdocs.org/aircraft/N406UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 454
- Aircraft time: 58,352 hours, 21,905 cycles
- Engine: Iae V2527A5
- System (JASC): [3412 · Outside Air Temperature Indicator/Sensor](https://openairdocs.org/jasc/3412)
- Part: Indicator
- Part number: HG1150AC06
- Part serial: 4563
- Condition: Inoperative
- Location: Adiru
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011072503762

## Discrepancy

GROUND POWER DROPPED OFF THE AIRCRAFT.  AFTER POWER WAS RESTORED THE COCKPIT SCREENS WOULD NOT COME ON AND THE GRND WARNING HORN GOES OFF WHEN ALIGNING ADIRU'S NR 1 AND NR 3.  UPPER ECAM 'BCL2' FAULT DISPLAYED, BUT BCL2 TESTS OKAY.  REPLACED BCL2,  NO HELP WITH ORG PROBLEM.  ECAM FAULT CLEARED.  REPLACED SHIP BAT2 PER AMM, NO HELP.  ADIRU1-3 CAUSE CREW HORN AND 'ON BAT' LIGHT ON ADIRU'S CDU.  FOUND ADIRU NR 1 AND ADIRU NR 3 WITH FAULTS.  REPLACED BOTH ADIRU(S) - AIRCRAFT SYSTEMS NOW OPS CHECK GOOD.  NO ECAM FAILURE MESSAGES NOTED.

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