Service difficulty report · Oxygen System · Boeing 777222

Difficulty date
November 7, 2008
Submitted
November 18, 2008
Operation
Air carrier
Aircraft
N786UA
Make and model
Boeing 777222
Aircraft serial
26938
Aircraft time
50,828 hours, 7,537 cycles
Engine
Pwa PW40903
Part
Oxygen System
Part number
MXP4023
Condition
Malfunctioned
Location
Cockpit
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

F/O OXYGEN MASK TEST DOES NOT TEST. REPLACED O2 BOX. OPS OKAY, LEAK CHECKED GOOD.