# SDR AALA202202018680

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 30, 2022
- Submitted: February 1, 2022
- Operation: Air carrier
- Aircraft: [N560UW](https://openairdocs.org/aircraft/N560UW), registered now
- Make and model: Airbus A300*
- Aircraft serial: 5300
- Aircraft time: 27,753 hours, 11,089 cycles
- System (JASC): [3242 · Brake](https://openairdocs.org/jasc/3242)
- Part: Wire Harness
- Condition: Shorted
- Location: Zone 700 - Gears
- Stage of operation: TO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: C, D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202202018680

## Discrepancy

AIRCRAFT WAS GROUNDED: ABORTED TAKEOFF AT 80 KNOTS DUE TO BRAKES RELEASED ECAM MESSAGE. SAFELY RETURNED TO GATE. **SUPPLEMENTAL REPORT FOR AALA202201318680: ACCOMPLISHED TSM 32-42-00-810-815. CONFIRMED RIGHT HAND MLG, 2M AXILE HARNESS SHORT TO SHIELD CAUSING LOSS OF TACHOMETER 4 SIGNAL TO BRAKE AND STEERING CONTROL UNIT (BSCU). REPLACED HARNESS (AALA202201318680) PER AMM 32-11-43. REPLACED UNSERVICEABLE RECEPTACLE LGAB4-4 (AALA202201317638) PER ESPM 20-44-11 AND AWM 32-11-02. ACCOMPLISHED SATISFACTORY ELECTRICAL TEST BETWEEN BSCU AND TACHOMETER 4. ACCOMPLISHED SATISFACTORY LMP GROUND CONFIDENCE CHECK. ACCOMPLISHED SATISFACTORY NORMAL BRAKE OPERATION, TACHOMETER FUNCTIONAL TEST, AND BSCU BITE CHECK PER AMM 32-42-00 AND AMM 32-46-00. ACCOMPLISHED SATISFACTORY BRAKE TEMPERATURE OPERATION CHECK PER AMM 32-47-00.** (CLOSED)

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