Service difficulty report · Cooling Fan · Boeing 737990ER

Difficulty date
May 24, 2024
Submitted
May 28, 2024
Operation
Air carrier
Aircraft
N459AS
Make and model
Boeing 737990ER
Aircraft serial
36352
Aircraft time
37,998 hours, 11,852 cycles
Part
Cooling Fan
Part number
4101054
Part serial
23142
Condition
Failed
Location
E/E Compartment
Part time
38,004 hours, 11,854 cycles
Stage of operation
CR
How discovered
O
Nature of condition
B
Precautionary procedure
K

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

What was found

EQUIPMENT COOLING SUPPLY OFF AMBER ILLUMINATED IN FLIGHT. QRH EXECUTED. EQUIPMENT COOLING SWITCHED TO ALT, AMBER LIGHT EXTINGUISHED. ELECTRICAL ODOR SMELLED WHILE LIGHT WAS ILLUMINATED. GROUNDED - YES. ON M1322 (NORMAL SPLY FAN) ON D3470 PIN 1,2 AND 3, 115V AC IS PRESENT. PIN 5 AND 6 HAS GOOD GROUND REF WDM 21-27-31. REMOVED AND REPLACED EQUIPMENT COOLING SUPPLY FAN REF AMM 21-27-02-400-801. OPS CHECK GOOD, NO FURTHER DEFECT.