Service difficulty report · Relief Valve · Boeing 757251
FAA SDR system
- Difficulty date
- April 14, 2014
- Submitted
- April 17, 2014
- Operation
- Air carrier
- Make and model
- Boeing 757251
- Aircraft serial
- 26496
- Aircraft time
- 53,859 hours, 20,735 cycles
- Part
- Relief Valve
- Condition
- No Test
- Location
- Cabin Pressure
- Stage of operation
- LD
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH UPPER AND LOWER POSITIVE PRESSURE RELIEF VALVES FAILED OPS CHECKOUT. INSTALLED BOTH UPPER AND LOWER POSITIVE PRESSURE RELIEF VALVES IAW AMM 21-32. NEEDS OPS CHECK. LOWER VALVE OPS CHECKS GOOD IAW AMM 21-32. UPPER VALVE FAILED CHECK. REMOVED UPPER VALVE AGAIN AGAIN AND REPLACED IAW AMM 21-32. UPPER VALVE NOW CHECKS GOOD IAW AMM 21-32.