SDR IPXA2026012020848

Service difficulty report · Cooling Turbine · Boeing 747428F

Difficulty date: January 15, 2026
Submitted: January 20, 2026
Operation: Air carrier
Aircraft: N580UP
Make and model: Boeing 747428F
Aircraft serial: 25632
Aircraft time: 122,444 hours, 20,957 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Cooling Turbine
Condition: Warning Message
Stage of operation: DE
How discovered: O
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

EMERGENCY DECLARED, EQUIP COOLING EICAS MESSAGE AT TOP OF DESCENT, QRH PROCEDURE DID NOT CLEAR THE MESSAGE, STATUS MESSAGE EE CLNG EXH FAN AFTER BLOCK OUT, MULTIPLE EE STATUS MESSAGES ON BLOCK IN REF AMM 21-58-00-700-804. ++CYCLE EE COOLING PCA CB, ALL MSG CLEAR, CMC GND TEST PASS, AIRCRAFT OK FOR SERVICE