# SDR CALA2026040114996

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N653UA](https://openairdocs.org/aircraft/N653UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25391
- Aircraft time: 129,834 hours, 19,846 cycles
- System (JASC): [2597 · Equipment/Furnishings Wiring](https://openairdocs.org/jasc/2597)
- Part: Wire Harness
- Part number: 286T0704
- Condition: Damaged
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026040114996

## Discrepancy

RAMP REPORTED PALLET STUCK IN FWD CARGO, UPON REMOVAL,  NOTED MULTIPLE PDU'S INOPERATIVE AT POSITIONS 5R, 8R, 8C, 5C, 8L. AFTER INVESTIGATION LOOM W0704 FOUND WITH 15 BROKEN WIRES DUE TO BURNING. MANY OTHER WIRES SHOWING SIGNS OF BURNING BUT HAVE NOT BROKEN. DAMAGED LOOM W0704 ONLY AFFECTS THE PDUS IN THE FWD CARGO. BURNT WIRES HAVE BEEN CAPPED & STOWED SAFELY IAW SWPM 20-10-11.  FWD CARGO PDU DRIVE SYS INOP,  PDU PWR ISOLATED.  ISOLATED AND TERMINATED OF EXPOSED WIRES, NOTICED THAT WIRE BUNDLE W0702 RUNS ALONG SIDE WIRE BUNDLE W0704.  SYSTEM HAS BEEN DEACTIVATED & ISOLATED.   ISOLATED SYS,  CB'S HAVE BEEN PULLED AND COLLARED ON THE P35 PANEL. FWD CARGO HANDLING SYSTEM INOPERATIVE. TROUBLESHOT PER WDM 25-53-12-1 TO IDENTIFY THE DAMAGED WIRES TO THEIR RESPECTED PDU'S. IDENTIFIED PDU 5R,

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