# SDR CALA2025112811565

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2025
- Submitted: November 28, 2025
- Operation: Air carrier
- Aircraft: [N47412](https://openairdocs.org/aircraft/N47412), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 68811
- Aircraft time: 668 hours, 226 cycles
- System (JASC): [3600 · Pneumatic System](https://openairdocs.org/jasc/3600)
- Part: Shutoff Valve
- Part number: 632160643
- Part serial: 5122
- Condition: Faulted
- Location: Nr 2
- Part time: 647 hours, 218 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/CALA2025112811565

## Discrepancy

ENGINE ANTI-ICE AMBER LIGHT ON NR 2 ENGINE CAME ON. PER CREW ISSUE PRESENTED DURING CLIMB. REF FIM 36-21011 PILOT TRIED TO RECYCLE NO HELP.   COMPLIED WITH MEL HPSOV IS DEACTIVATED CLOSED. MAINT PROCEDURE COMPLIED WITH. CB FOR NR 2 COLLARED. MSG INHIBITED. PLACARD INSTALLED. *DM* SEE FIM 36-21 TSK 802 FOR NOTED MSG 36-21011.   REPLACED PRSOV VALVE AND PRESSURE SENSOR. REF. FIM 36-21 TASK802, AMM 36-11-04/401, AMM 36-11-05/401. RESTORED SYSTEM TO NORMAL. OPS CHECKED AND LEAK CHECKED GOOD.

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