# SDR UIEA2024112801118

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2024
- Submitted: December 2, 2024
- Operation: Air carrier
- Aircraft: [N642GT](https://openairdocs.org/aircraft/N642GT), registered now
- Make and model: Boeing 767-3Y0
- Registry model: [Boeing 767-3Y0](https://openairdocs.org/model/boeing-767-3y0) (OpenAirDocs)
- Aircraft serial: 26207
- Aircraft time: 86,485 hours, 25,039 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Shutoff Valve
- Part number: 7998014
- Part serial: 2005010743
- Condition: Faulted
- 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/UIEA2024112801118

## Discrepancy

DURING CRUISE, RECEIVED A MASTER WARNING "CABIN ALT".  COMPLIED W/ QRH.  FL380. CABIN ALT 11,000' DPSI 7.0.  USED MANUAL PRESSURIZATION MODE TO CONTROL & STABILIZED CABIN ALT.  "CABIN AUTO INOP" CAUTION MSG.  COMPLIED W/ QRH PROC.  "CABIN ALT AUTO 1" AND "CABIN ALT AUTO 2" STATUS MSG'S.(<P>T/S PER FIM 21-31 FT 803. LOW FLOW INDICATED ON BITE TEST ASU, PER FIM, FOUND LH ENG PRSOV. R/R LH ENG PRSOV, LEAK & OPS CHK OK PER AMM 36-11-09. AS A PRECUATION, R/R CABIN PRESSURE CONTROL PANEL, DUE TO LANDING ACT SET KNOB SLIPS. OPS CHECK NORMAL IAW AMM 21-31-01.</P>)

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