# SDR DL72L000281

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2000
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N509DA](https://openairdocs.org/aircraft/N509DA), registered now
- Make and model: Boeing 727232
- Aircraft serial: 21311
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Valve
- Condition: Inoperative
- Location: Lt Pack
- Component: 39854021
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL72L000281

## Discrepancy

CABIN ALTITUDE CLIMBS AT 1000-300 FPM.  DUCT PRESS INDICATES LT 45 RT 22 PSI.  SWAPPED BLEED SOURCE AND CYCLED PACK SWITCH, NO EFFECT.  FOUND LEFT PACK FWD PACK VALVE INOP.  REPLACED SAME.  ALSO, REPLACED RT BLEED HI PRESS VALVE.  LEAK CKS GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.