# SDR UALA2010032901032

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2010
- Submitted: April 7, 2010
- Operation: Air carrier
- Aircraft: [N671UA](https://openairdocs.org/aircraft/N671UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30026
- Aircraft time: 38,409 hours, 10,151 cycles
- Engine: Pwa PW4056
- System (JASC): [2931 · Hydraulic Pressure Indicator](https://openairdocs.org/jasc/2931)
- Part: Relay
- Condition: Inoperative
- Location: Hydraulic Sys
- Stage of operation: IN
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010032901032

## Discrepancy

C ADP LOW PRESS LIGHT ILLUMINATED IN AUTO.  EICAS MSG DISPLAYED C HYD DEM PUMP.  ADP PRESS IS NORMAL.  COMMENTS: C HYD DEM PUMP.  FOUND ADP INOP IN AUTO AND ON MODE. TROUBLESHOT AND REPLACED K443 RELAY. OPS CHK OKAY.

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