# SDR IPXA2026090366928

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2026
- Submitted: September 3, 2026
- Operation: Air carrier
- Aircraft: [N434UP](https://openairdocs.org/aircraft/N434UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25465
- Aircraft time: 33,661 hours, 22,547 cycles
- System (JASC): [3097 · Ice/Rain Protection System Wiring](https://openairdocs.org/jasc/3097)
- Part: Circuit Breaker
- Part number: BACC18AE35
- Condition: Tripped
- 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/IPXA2026090366928

## Discrepancy

AIR TURN BACK, WHILE ENROUTE, EICAS MSG GND EQUIPMENT COOLING RAN QRH AND PUT GND EQUIPMENT IN ALT. PROBE HEAT EICAS MSG. RT FWD FUEL PUMP AND L AFT FUEL PUMP EICAS MSGS.  STATUS MSG EQPT COOLING FAN.  RESET CB 310 AND RAN ALL SYSTEMS COMING OF AC BUS L SECTION 3 SIMULTANEOUSLY AND BREAKER DID NOT TRIP, REF WD 24-51-13-1. REPLACED CB C310 PRECAUTIONARILY. AFFECTED SYSTEMS OPS CHECK NORMAL PER MM 28-22-00, 30-31-00, 30-32-00, AND 21-58-00.

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