# SDR 2005UALA00599

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2005
- Submitted: July 12, 2005
- Operation: Air carrier
- Aircraft: [N786UA](https://openairdocs.org/aircraft/N786UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26938
- Aircraft time: 36,296 hours, 5,562 cycles
- Engine: Pwa PW4090
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Power Unit
- Part number: BPAS101
- Condition: Malfunctioned
- Location: Door 4r
- Part time: 2,241 hours, 322 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005UALA00599

## Discrepancy

4R EPAS BATTERY INDICATOR LIGHTS INTERMITTENT WHILE TAXIING.  POSSIBLE SWITCH FAILURE.  TEST LIGHT CHECKED DURING OPERATIONAL TESTING OF EPAS FOR BATTERY CHARGE AT CHECK INTERVALS PER EC 20-5211-000AA-A. UNIT CYCLED TO SHOP FOR BATTERY REPLACEMENT AT INTERVALS NOT EXCEEDING 19 MONTHS PER EC 20-5220-000LA-A. TROUBLESHOOTING AT SHOP  WILL DETERMINE FAULT SOURCE.

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