# SDR CALA2026011913077

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 15, 2026
- Submitted: January 19, 2026
- Operation: Air carrier
- Aircraft: [N68807](https://openairdocs.org/aircraft/N68807), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42819
- Aircraft time: 37,931 hours, 13,905 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 2193301AD
- Part serial: 1396100
- Condition: Faulty
- Location: Nr 1
- Part time: 37,906 hours, 13,894 cycles
- Stage of operation: CR
- 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/CALA2026011913077

## Discrepancy

CABIN ALTITUDE WARNING IN FLIGHT PERF BITE ON BOTH CABIN PRESS CTLRS. PRESS CTLR #1 SHOWS LEG 00 ONE FAULT. MANUAL MODE FAULT CODE 058. CTLR #2 SHOWS LEG 00 ONE FAULT. MAUAL MODE FAULT CODE 017. PRESS AC AND NO LEAKS NOTED. WAS ABLE TO MAINTAIN CABIN PRESS WITH ONE PACK. PERF CABIN ALT WARNING SWITCH FUNCTIONAL TEST REFF AMM 21-33-00-000-801. ALL THREE SWITCHES CHKS OK NO FAULTS NOTED. REF LOG PAGES 7622815 AND 7622827 ACCOMPLISHED RT ENGINE HEALTH CHECK AND REPLACED CABIN PRESSURE CONTROLLER OK FOR SERVICE

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