What was found
CREW O2 LEAKING DOWN AT APPROXIMATELY 10 PSI EVERY 6 MINS. STARTING PRESSURE 1750, NOW 770. REPLACED THE CREW OXYGEN CYLINDER PER AMM. PERFORMED CREW OXYGEN LEAK TEST PER AMM. TESTED GOOD.
- Difficulty date
- June 2, 2011
- Submitted
- June 3, 2011
- Operation
- Air carrier
- Aircraft
- N121UA
- Make and model
- Boeing 747422
- Aircraft serial
- 29167
- Aircraft time
- 50,418 hours, 5,993 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 3510 · Crew Oxygen System
- Part
- Oxygen Bottle
- Condition
- Leaking
- Location
- O2 System
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.