# SDR CALA2026033014902

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2026
- Submitted: March 30, 2026
- Operation: Air carrier
- Aircraft: [N657UA](https://openairdocs.org/aircraft/N657UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 27112
- Aircraft time: 128,333 hours, 19,625 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 3508806
- Part serial: MX512039
- Condition: Faulted
- Location: Hyd Sys
- Part time: 500,804 hours, 500,111 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026033014902

## Discrepancy

R HYD QTY EICAS FOLLOW- ED BY R HYD SYS PRESS R HYD QTY READS 0FOUND HYD CASE DRAIN HOSE BLOWN.  R & R HYD CASE DRAIN HOSE PER AMM SUB TASK 71-00-02-420-057-C7 WHILE LEAK CHECKING HYD CASE DRAIN HOSE DURING ENG RUN THE EDP NEVER CAME ON.  R & R RT SYS RETURN FILTER.  STILL REQUIRES LEAK CHK TO BE PERFORMED AFTER PUMP CHANGE. NO DEBRIS WERE FOUND ON OLD FILTER ELEMENT REF AMM 29-11-17/401. REMOVED RT EDP PRESSURE & CASE DRAIN FILTERS & INSPECTED FOR DEBRIS.  NONE FOUND.  INSTALLED NEW FILTER ELEMENTS.  STILL REQUIRES LEAK CHECKS AFTER PUMP REPLACEMENT.  REF STEP - NO MANUAL.  REMOVED #2 ENG EDP UP TO AND INCLUDING STEP D.(15) REF AMM 29-11-05-004-001-005 CONTINUED OF THE REMOVAL OF THE #2 ENG EDP FROM STEP D.(16), REF AMM 29-11-05-004-001-005. REPLACED #2 ENG EDP, REF AMM 29-11-05-404-029-005. OPS & LEAK CHKD GOOD, OK TO CONTINUE.

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