# SDR CALA2026010912837

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2026
- Submitted: January 9, 2026
- Operation: Air carrier
- Aircraft: [N38403](https://openairdocs.org/aircraft/N38403), registered now
- Make and model: Boeing 737924
- Aircraft serial: 30120
- Aircraft time: 66,746 hours, 28,093 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 849589
- Part serial: MX717067
- Condition: Failed
- Location: Nr 1 Hyd
- Part time: 55,186 hours, 20,276 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/CALA2026010912837

## Discrepancy

ENGINE 1 SYS A HYD  PRESSURE LIGHT ILLUMINATED.   FOUND NR 1 ENG DRIVEN HYDRAULIC PUMP TO HAVE COMPLETE MECHANICAL FAILURE. REMOVED ENG 1 EDP IAW AMM 29-11-11-000-801-001. UP TO AND INCLUDING STEPS F. (10) (B). INSTALLED AND COMPLETED UP TO AND INCLUDING STEPS 3 H 8 (A) REF AMM 29-11-11, CONTINUE ON STEP I ENGINE-DRIVEN PUMP INSTALLATION TEST.   COMPLIED WITH OPS CHECK AND LEAK CHECK OF ENG 1 HYD PUMP IAW AMM 29-11-11. NO DEFECTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.