# SDR AALA202106149025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 11, 2021
- Submitted: June 14, 2021
- Operation: Air carrier
- Aircraft: [N969AN](https://openairdocs.org/aircraft/N969AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29546
- Aircraft time: 56,786 hours, 23,362 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Relay
- Part number: W260F4AM11
- Condition: Inoperative
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202106149025

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: PRESSURIZATION PANEL AUTO FAIL AND ALTERNATE LIGHT ILLUMINATED WITH CONTROL SWITCH IN AUTO. FLIGHT DECLARED EMERGENCY. WAS NOT OVERWEIGHT FOR LANDING. REMOVED AND REPLACED RELAYS 556 (AALA202106149013), 557 (AALA202106149024), 558 PER SSM 21-31-23 ESPM CH 20 CABIN PRESSURE SYSTEM CHECK NORMAL PER AMM 21-31-00.

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