# SDR ASAA2022111640793

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2022
- Submitted: November 17, 2022
- Operation: Air carrier
- Aircraft: [N551AS](https://openairdocs.org/aircraft/N551AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 34593
- Aircraft time: 55,844 hours, 19,416 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 2193301AA
- Part serial: 0595835
- Condition: Faulted
- Location: Cabin Pressure
- Part time: 55,848 hours, 19,421 cycles
- Stage of operation: CL
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022111640793

## Discrepancy

DURING CLIMBOUT THE AUTO PRESS LIGHT ILLUMINATED DUE TO HIGH CABIN RATE OF CLIMB. GROUNDED - YES. AIR TURNBACK -- REVERSED CONFIGURATION CHANGE, NO FAULTS NOTED ON #1 & #2CPC. DUE TO #1 CPC ON MEL REMOVED AND REPLACED #2 CPC, OPS CHECK GOOD IAW B737-800 AMM 21-31-01, REAPPLIED CONFIGURATION CHANGE NR 1 CPC MEL 21-14C  61612 PER TECH SERVICES #1 CPC REQUIRES REPLACEMENT. REPLACED CPC#1 REF AMM 21-31-01, CPC#2 SHOWED CABIN PRESSURE CONTROL FAULT. REPLACED CABIN PRESSURE CONTROL PANEL REF AMM 21-31-02 RESET CP #1 C/B BOTH CPC OPS TEST PASS. MANUAL MODE SYSTEM ALSO PASSES REF AMM 21-31-00.

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