What was found
OBSERVERS OXYGEN MASK DOES NOT FLOW WHEN EMERGENCY BUTTON IS PUSHED. REMOVED AND REPLACED OBSERVER`S OXYGEN MASK IAW AMM 35-11-51. OPS CHKD GOOD.
- Difficulty date
- July 5, 2026
- Submitted
- July 6, 2026
- Operation
- Air carrier
- Aircraft
- N355UP
- Make and model
- Boeing 76734AF
- Aircraft serial
- 37863
- Aircraft time
- 31,475 hours, 11,681 cycles
- System (JASC)
- 3510 · Crew Oxygen System
- Part
- Oxygen Mask
- Condition
- No Test
- Location
- Zone 200
- 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.