# SDR AALA202603029110

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2026
- Submitted: March 3, 2026
- Operation: Air carrier
- Aircraft: [N880NN](https://openairdocs.org/aircraft/N880NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 40769
- Aircraft time: 41,198 hours, 17,839 cycles
- System (JASC): [3110 · Instrument Panel](https://openairdocs.org/jasc/3110)
- Part: Control Panel
- Condition: Failed
- Location: Zone 200
- Stage of operation: CL
- How discovered: O
- Nature of condition: G, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202603029110

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: UPON CLIMB OUT WE EXPERIENCED A RAPID RATE OF CABIN ALTITUDE ASCENT. FLIGHT ATTENDANTS SAID A SWOOSHING NOISE COULD BE HEARD FROM THE AFT LEFT DOOR BOTTOM. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DCA. TROUBLESHOOT FINDING LEFT SWITCH PACK NUMBER 1 INOPERATIVE. REMOVED AND REPLACED AIR CONDITIONING OVERHEAD MODULE PANEL, PER 31-11-94. OPS TEST GOOD. ALSO PERFORMED PRESSURIZATION TASK 21-31-00-710-801 AND 21-31-00-700-802. SYSTEM GROUND TEST AND MANUAL MODE TEST.

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