# SDR ASAA2023071043984

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2023
- Submitted: July 13, 2023
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 58,262 hours, 17,262 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 71211997101AC
- Part serial: 0219562
- Condition: Faulty
- Location: Cabin Pressure
- Part time: 68,443 hours, 22,455 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023071043984

## Discrepancy

CPC #1 AND #2 SYSTEM TEST FAILS CODE 001. GROUNDED - YES. REMOVED AND REPLACED #1 AND #2 CPC REF AMM 21-31-01/401. STILL REQUIRE OPS CHECKS. R.GRIMALDO 22707 07/11/2023. REINSTALLED CPC'S #1 AND #2, INSTL TEST PASS REF MM 21-31-01 AND 21-31-00-700-802, ETOPS GROUND VERIFICATION SUCCESSFUL SEAMC PHIL ADVISED. REF ALSO LOG 60851426 FOR WIRE REPAIR E4-1.

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