# SDR DL75A040390

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2004
- Submitted: May 6, 2004
- Operation: Air carrier
- Aircraft: [N757AT](https://openairdocs.org/aircraft/N757AT), registered now
- Make and model: Boeing 757212
- Aircraft serial: 23127
- Aircraft time: 54,202 hours, 27,412 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 211738813
- Part serial: 702092
- Condition: Inoperative
- Location: Cabin Pressure
- 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/DL75A040390

## Discrepancy

AT 37,000 FT CABIN ALTITUDE HORN CAME ON.  SWITCHED TO AUTO 2 WITH NO IMMEDIATE ALT MOVEMENT, SO SWITCHED TO MANUAL.  REPLACED NR 1 AUTO PRESSURE CONTROLLER.

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