What was found
DUE TO RAPID INCREASE IN CABIN ALTITUDE WHEN NR 2 HF SYSTEM KEYED, PASSENGER MASKS DEPLOYED AND OXYGEN ACTIVATED. REPLACED HF COUPLER, STOWED ALL MASKS AND RESET 02 FLOW CONTROL.
- Difficulty date
- September 23, 1995
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N850FT
- Make and model
- Boeing 747122
- Aircraft serial
- 19755
- System (JASC)
- 2310 · HF Communications System
- Part
- Hf Coupler
- Part number
- 6223371002
- Condition
- Failed
- Location
- Nr 2
- Stage of operation
- CR
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.