What was found
OUTFLOW VALVE FLUCTUATES CABIN RATE +/- 100FPM EVERY 10-15 MINUTES. PERFORMED BITE TEST WITH NO FAULTS FOUND AND PERFORMED MANUAL MODE CONTROL TEST WITH NO DEFECTS FOUND IAW AMM 21-31-00.
- Difficulty date
- February 2, 2021
- Submitted
- February 5, 2021
- Operation
- Air carrier
- Aircraft
- N1997A
- Make and model
- Boeing 76733A
- Aircraft serial
- 27310
- Aircraft time
- 99,584 hours, 20,662 cycles
- System (JASC)
- 2133 · Pressure Regulator/Outflow Valve
- Part
- Outflow Valve
- Condition
- Fluctuates
- Location
- Cabin
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.