- Difficulty date
- June 3, 2025
- Submitted
- June 4, 2025
- Operation
- Air carrier
- Make and model
- Boeing 7378H4
- Aircraft serial
- 33939
- Aircraft time
- 39,413 hours, 18,857 cycles
- Part
- Drain Valve
- Condition
- Faulty
- Location
- Zone 200
- Stage of operation
- CR
- How discovered
- C
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF CABIN PRESSURE AT 31;000 ' <[01]. REMOVED AND REPLACED AFT OUTFLOW VALVE REF AMM 21-31-03.; [02] ACCOMPLISHED CONDITIONAL INSPECTION REF 05-51-81. ALSO REPLACED DRAIN VALVES REF AMM 51-41-13; ADJUST AFT CARGO DOOR STOPS REF AMM 52-31-00. REMOVED AND REPLACED OUT FLOW VALVE REF AMM 21-31-03. AIRCRAFT PASSED PACK CONFIDENCE CHECK REF 721-00-01. AIRCRAFT OK FOR CONTINUED SERVICE.