# SDR UIEA2026042200238

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2026
- Submitted: April 24, 2026
- Operation: Air carrier
- Aircraft: [N1511A](https://openairdocs.org/aircraft/N1511A), registered now
- Make and model: Boeing 767383
- Aircraft serial: 24318
- Aircraft time: 112,177 hours, 20,111 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 60683221
- Part serial: 1242005
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026042200238

## Discrepancy

CABIN ALTITUDE EICAS MSG WARNING. PERFORMED EMERGENCY DESCENT TO 10,000 FT @ FL330, DIFF PSI 60-7.0, CABIN ALT 10000-11000 FT. NOTED OUTFLOW VALVE WAS APPROX HALF OPEN, NO CHANGE W/ AUTO 2 OR AUTO 1, WAS A SLOW RATE DECOMPRESSION.(<P>PERFORMED BITE TEST OF CABIN PRESSURE AUTO CONTROLLER IAW AMM 21-31-00. FOUND LOW INFLOW FAULT. R/R OUTFLOW VALVE IAW AMM 21-31-03 & IPC 21-31-03. OPS CHK GOOD. R/R CABIN PRESSURE AUTO CONTROLLER 2 IAW AMM 21-31-02 & IPC 21-31-02-03. OPS CHK OK. C/W AP 34620.</P> / <P> </P> / <P>OUTFLOW VALVE P/N 606832-21 S/N 124-2005</P> / <P>AUTO PRESSURE CONTROLER 2 P/N 2117388-6 S/N 59-1772</P>)

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