# SDR ASAA2017060720979

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2017
- Submitted: June 9, 2017
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 16,441 hours, 5,427 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Light
- Condition: Inoperative
- Location: Control Panel
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017060720979

## Discrepancy

AFTER AIRBORNE, NOTICED LED LIGHTING ON PRESSURIZATION CONTROL PANEL BLANKED OUT. ALTERNAT LANDING ALT & OUTFLOW VALVE INDICATOR INOPERATIVE.  ACFT GROUNDED.  PERFORMED FIM 21-31, TASK 803. VERIFIED ALL CIRCUIT BREAKERS ON P6-4 WERE SET. LIGHTING RETURNED TO PANEL.  ALL LIGHTING CHECKS OF PANEL CHECKED GOOD. NO FAULTS LOGGED ON DCPC1 OR 2. CHECKS GOOD FOR SERVICE.

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