What was found
OXY REGULATOR ABNORMAL OPERATION - CAPT CREW COMMENTS: MASK-REG DOES NOT ALLOW PILOT TO EXHALE. MASK TESTED OKAY. REPLACED O2 MASK PER MM. OPS CHECK GOOD.
- Difficulty date
- April 9, 2011
- Submitted
- April 11, 2011
- Operation
- Air carrier
- Aircraft
- N118UA
- Make and model
- Boeing 747422
- Aircraft serial
- 28811
- Aircraft time
- 48,741 hours, 5,928 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 3510 · Crew Oxygen System
- Part
- Oxygen Mask
- Part number
- MC1019151
- Part serial
- 189
- Condition
- Faulty
- Location
- Cockpit
- Stage of operation
- IN
- 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.