What was found
PAX O2 READS 1460 PSI FROM COCKPIT EICAS. AFTER EXTENSIVE TROUBLE SHOOTING FOUND LEAK IN OXYGEN LINE B-NUT. TIGHTENED B-NUT SERVICED OXYGEN SYSTEM. AC OK FOR SERVICE.
- Difficulty date
- March 30, 2008
- Submitted
- April 1, 2008
- Operation
- Air carrier
- Aircraft
- N181UA
- Make and model
- Boeing 747422
- Aircraft serial
- 25278
- Aircraft time
- 71,215 hours, 8,809 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 3520 · Passenger Oxygen System
- Part
- B-Nut
- Condition
- Leaking
- Location
- Pax Oxygen
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.