- Difficulty date
- April 28, 2026
- Submitted
- April 29, 2026
- Operation
- Air carrier
- Make and model
- Boeing 777FZB
- Aircraft serial
- 37989
- Aircraft time
- 68,675 hours, 8,180 cycles
- Part
- Oxygen Box
- Part number
- MXP4023
- Part serial
- SE49348
- Condition
- Broken
- Location
- Zone 200
- Stage of operation
- TX
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN O2 MASK PRESS TO TEST AND RESET TAB IS BROKEN. SWAPPED CAPT & 1ST OBSERVER O2 BOX PER 777 AMM 35-11-18 FOR DISPATCH. PLACED 1ST OBSERVER SEAT & ASSOCIATED EQUIPMENT ON MEL. LP 1940127 M2: REMOVED AND REPLACED 1ST OBSERVER'S O2 BOX IAW AMM 35-11-18. OPS CHECK & LEAK CHECKED GOOD IAW IPC 35-11-18-01.