# SDR AALA2019101439007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2019
- Submitted: November 26, 2019
- Operation: Air carrier
- Aircraft: [N936NN](https://openairdocs.org/aircraft/N936NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31176
- Aircraft time: 19,256 hours, 7,927 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning Light
- Condition: False Activation
- Location: Cabin Pressure
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019101439007

## Discrepancy

AIRCRAFT WAS GROUNDED: DESCENDING TO 3,000 THE AUTO FAIL AND ALTN PRESSURIZATION LIGHTS ILLUMINATED. PERFORMED PRESSURIZATION SYS. 1 AND 2 ADJUSTMENT AND TEST IAW AMM 21-31-00 . OK FOR SERVICE IAW AMM 21-31-00.   CLIMBING THROUGH 7000 AUTO PRESSURIZATION CONTROL AUTO FAIL LIGHT AND ALTN LIGHTS ILLUMINATED. MAINTENANCE ACCOMPLISHED AMM TASK 21-31-00-700-802 BITE TEST ON BOTH PRESSURE CONTROLLERS, NO FAULTS NOTED TEST OK AUTO FAIL LIGHT EXTINQUISHED SYSTEM OK FOR SERVICE IAW AMM 21-31-00.

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