What was found
EXTREMELY LOUD VIBRATION AT MID CABIN ACCOMPANIED BY THUMPING SOUND. FOUND LT TURBO FAN VALVE FAILED OPEN. SWAPPED LT AND RT TURBO FAN VALVES PER MM. OPS CHECK GOOD. NO VIBRATIONS OR OTHER IRREGULARITIES NOTED.
- Difficulty date
- March 3, 1999
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N392SW
- Make and model
- Boeing 7373H4
- Aircraft serial
- 27379
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Valve
- Part number
- 39267831
- Condition
- Failed
- Location
- Lt Pack
- Stage of operation
- CR
- Nature of condition
- E
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.