What was found
CREW REPORTED EXCESSIVE DROP IN PRESSURE WHILE PERFORMING O2 MASK CHECK. SECURED O2 BOTTLE VALVE IN OPEN POSITION. MASK TEST WITHIN LIMITS PER MM.
- Difficulty date
- November 11, 2012
- Submitted
- January 14, 2013
- Operation
- Air carrier
- Aircraft
- N119UA
- Make and model
- Boeing 747422
- Aircraft serial
- 28812
- Aircraft time
- 57,362 hours, 6,627 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 3510 · Crew Oxygen System
- Part
- Valve
- Condition
- Unsecure
- Location
- O2 Bottle
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.