# SDR UALA2011120506672

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2011
- Submitted: January 3, 2012
- Operation: Air carrier
- Aircraft: [N783UA](https://openairdocs.org/aircraft/N783UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26950
- Aircraft time: 65,831 hours, 9,393 cycles
- Engine: Pwa PW40903
- System (JASC): [3432 · Glide Slope System](https://openairdocs.org/jasc/3432)
- Part: Circuit Card
- Part number: 263BA1011
- Part serial: 103
- Condition: Malfunctioned
- Location: Apu Battery
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011120506672

## Discrepancy

APU BATTERY OVERHEAT STATUS MESSAGE DISPLAYED ON EICAS.   REPLACED APU BATTERY, NO HELP.  SIGNAL CONDITIONING CARD REPLACED REF AMM & DIODE 405 POS-12 IN P310 REPLACED REF WDM 24-09-26 PG 1-SHT2, NO MESSAGES PRESENT AFTER 4 HRS OF ACFT POWER -ON-, WITH MULTIPLE SWITCHING OF POWER FROM APU-GND, POWER ON-OFF-ON. APU STARTED NORMAL. REPLACED P310 SCC, TESTED OK NO FAULTS.

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