# SDR CALA2026022414050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2026
- Submitted: February 24, 2026
- Operation: Air carrier
- Aircraft: [N38451](https://openairdocs.org/aircraft/N38451), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 31646
- Aircraft time: 42,939 hours, 15,894 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Drain Line
- Part number: 849589
- Part serial: MX724025
- Condition: Disconnected
- Location: Hyd Sys
- Part time: 45,704 hours, 16,264 cycles
- Stage of operation: CL
- 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/CALA2026022414050

## Discrepancy

ENG DRIVEN HYDRAULIC  PUMP NO 1 LO PRESSURE LT ON CLIMBING THRU 10000 FEET.UPGRADING ALL WORK PERFORMED TO IDT DUE TO REPEAT HISTORY. CHECK PER APPROPRIATE MAINTENANCE SPECIFICATIONS. VERIFY ANY REPLACEM ENT PARTS ARE CORRECT CONFIGURATION FOR INSTALLATION (CAN USE DO CUMENTS FOR P/N VERIFICATION IF P/N NOT VISIBLE AFTER INSTALLATI ON).VISUALLY INSPECT FOR SECURITY OF CONNECTORS / HOSES / CLAMPS , OBSERVE MOUNT BOLT TORQUES. VERIFY REQUIRED FUNCTIONAL & LEAK CHECKS. ACCOMPLISHED ENGINE RUNS IAW FIM TASK 29-30 TASK 812. E1 EDP SHOWS BOTH ZERO PRESSURE PRODUCED WITH LOW PRESSURE LIGHT ILLUMINATED. APPROVED & NOTED FOR FAULT CONFIRMATION. CONTINUED TROUBLESHOOTING PER FIM TASK 29-30 TASK 812. BEGAN FAULT ISOLATION PROCEDURES. COMPLETED UP TO AND INCLUDING STEP 812. F (5)(B). FOUND EDP CASE DRAIN QUICK DISCONNECT HOSE WHERE IT ATTACHES TO THE PYLON NOT FULLY SEATED. TIGHTENED QUICK DISCONNECT ON THE CASE DRAIN LINE.

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