What was found
MX PICKUP SMOKE OVERRIDE VALVE OPEN. REMOVED VALVE FOR TROUBLESHOOTING. FOUND BUTTERFLY SHAFT SHEARED. INSTALLED SMOKE/ OVERRIDE VALVE IAW MM 21-58-06. GROUND TEST OK IAW MM TASK 21-58-00-705-001.
- Difficulty date
- December 15, 2012
- Submitted
- December 15, 2012
- Operation
- Air carrier
- Aircraft
- N418MC
- Make and model
- Boeing 74747UF
- Aircraft serial
- 32840
- Aircraft time
- 43,557 hours, 6,546 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Shaft
- Part number
- 4203651
- Part serial
- 1758A
- Condition
- Sheared
- Location
- Overide Valve
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.