What was found
AT TOP OF CLIMB ELECTRONIC EQUIPMENT COOLING GROUND EXHAUST VALVE FAIL MESSAGE. WHEN SWITCHED ELECTRONIC EQUIPMENT COOLING TO OVERRIDE POSITION, CONTINUED TO HAVE THE OVERHEAT PROBLEM CAUSING A RETURN TO DEPARTURE.
- Difficulty date
- November 18, 2015
- Submitted
- November 20, 2015
- Operation
- Air carrier
- Aircraft
- N904AR
- Make and model
- Boeing 747428F
- Aircraft serial
- 33097
- Aircraft time
- 41,638 hours, 6,171 cycles
- System (JASC)
- 2121 · Air Distribution Fan
- Part
- Fan
- Condition
- Overheated
- Location
- Equip Cooling
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- M, J
- Precautionary procedure
- J, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.