# SDR IPXA2026020956799

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 5, 2026
- Submitted: February 9, 2026
- Operation: Air carrier
- Aircraft: [N415UP](https://openairdocs.org/aircraft/N415UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23855
- Aircraft time: 38,318 hours, 25,849 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning Message
- Condition: Illuminated
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026020956799

## Discrepancy

EMERGENCY DECLARED.  MOMENTARY CABIN ALTITUDE ALERTS IN FLIGHT FL 320 WITH RIGHT PACK ON, LEFT PACK OFF,   RESTORED LT PACK IAW QRH CHECK LIST.  CABIN CONTROLLABLE, NORMAL, PERFORMED MANUAL MODE CONTROL TEST OF CABIN PRESSURE CONTROL SYSTEM IAW AMM 21-31-00. OP CHECKED GOOD. PERFORMED OP CHECK OF PACK FLOW CONTROL VALVE IAW AMM 21-51-01. OP & LEAK CHECKED GOOD.  R & R NR 1 AUTO PRESSURE CONTROLLER IAW AMM 21-31-02. OP CHECK GOOD.  PLACARD REMOVED, DMP REVERSED.

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