# SDR UALA2010033001069

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 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: 38,424 hours, 10,155 cycles
- Engine: Pwa PW4056
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Modulating Valve
- Part number: 32687929
- Part serial: 33
- Condition: Faulty
- Location: Hydraulic Sys
- 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/UALA2010033001069

## Discrepancy

ADP FAILURE, RTFL.  ON GEAR RETRACTION C HYD DEM PUMP EICAS AND ASSOC OVHD PSI LIGHT ILLUM.  RAN FLT MAN SOP, NO HELP. REMOVED AND REPLACED ADP AND ASSOCIATED AIR MODULATING VALVE.

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