# SDR K11A2026102200405

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 22, 2026
- Submitted: October 22, 2026
- Operation: Air carrier
- Aircraft: [N730CK](https://openairdocs.org/aircraft/N730CK), registered now
- Make and model: Boeing 737-4C9
- Registry model: [Boeing 737-4C9](https://openairdocs.org/model/boeing-737-4c9) (OpenAirDocs)
- Aircraft serial: 26437
- Aircraft time: 62,892 hours, 33,469 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Pressure Switch
- Part number: 1225P62
- Part serial: 9301
- Condition: Failed
- Location: Zone 100
- Stage of operation: TO
- How discovered: O
- Nature of condition: G, J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/K11A2026102200405

## Discrepancy

DURING TAKEOFF ROLL MASTER CAUTION, FLT CONT AND HYD ANNUNCIATOR LIGHTS ILLUMINATED, FLT CONTROL LOW PRESSURE A LIGHT ILLUMINATED, DURING TAKE OFF ROLL STBY RUDDER ON ANNUNCIATOR LIGHTS ILLUMINATED.  REMOVED AND REPLACES SYSTEM A LOW PRESSURE SWITCH IAW AMM 27-09-61, OPS CHECK GOOD. REMOVED AND REINSTALLED FLT CONTROL HYD PACKAGE IAW AMM 24-04-21, REF ITEM #2 OF LP 737-003-2363. PERFORMED REPAIR CONFIGURATION OF STANDBY RUDDER ON LIGHT IAW AMM 27-21-00, PERFORMED HYD SYS FLIGHT CONTROL PACKAGE OPS CHECK IAW AMM 27-09-21 OPS CHECK GOOD.

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