What was found
FIRST OFFICERS O2 MASK, WHILE IN EMERGENCY MODE O2 FLOW "CHOO CHOO'S". SUSPECT FAULTY FLOW VALVE. REPLACED MASK PER MM 35-11 -18 OPS CHECKS NORMAL. AC OK FOR SERVICE.
- Difficulty date
- November 1, 2007
- Submitted
- November 1, 2007
- Operation
- Air carrier
- Aircraft
- N171UA
- Make and model
- Boeing 747422
- Aircraft serial
- 24322
- Aircraft time
- 69,190 hours, 8,377 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 3510 · Crew Oxygen System
- Part
- Oxygen Mask
- Part number
- MC1019151
- Condition
- Faulty
- Location
- Cockpit
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- W
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.