# SDR CALA2023111503351

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 2023
- Submitted: November 15, 2023
- Operation: Air carrier
- Aircraft: [N67058](https://openairdocs.org/aircraft/N67058), registered now
- Make and model: Boeing 767424ER
- Aircraft serial: 29453
- Aircraft time: 81,740 hours, 11,448 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Amu
- Part number: 5700112
- Part serial: 670
- Condition: Power Loss
- Location: Sta 434, E4 Rack
- Part time: 66,403 hours, 10,230 cycles
- Stage of operation: CL
- 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/CALA2023111503351

## Discrepancy

LOST POWER TO ALL 3 RADIO CONTROL PANELS, NO COMMS IN REF TO TOMC LOCKED LOGPAGE 6273058: FOUND AUDIO MANAGMENT UNIT LOOSE IN RACK. PULLED AMU AND INSPECTED UNIT AND RACK AND FOUND NO DEFECTS NOTED. REINSTALLED AMU, CLOSED BREAKERS. ALL POWER RETURNED AND TEST CALL SAT TO TOWER. PER AMM 23-51-05 UPDATE WITH PICTURE OF UNSERCURE AMU . REPLACE AMU AT THE REQUEST OF TOMC REF LOGS 6274081 AND 6273058 .  REMOVED AND REPLACED AMU, OPS CK GOOD NO FURTHER DEFECTS NOTED AT THIS TIME PER AMM 23-51-05. OVERWEIGHT LANDING WEIGHT 361.000 300FPM TOUCHDOWN COMPLIED WITH PHASE 1A AND 1B OVERWEIGHT LANDIND INSPECTIONS, NO DEFECTS NOTED PER AMM 05-51-01. THE TOMC CONTROLLER AND SENIOR MANAGER CONCUR THAT THE AIRCRAFT CAN BE RELEASED BACK TO SERVICE AFTER EXPERIENCING A DIVERSION OR AIR TURN BACK DUE TO A MECHANICAL REASON.

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