SDR ASAA2017072821486

Service difficulty report · Fan · Boeing 737990ER

Difficulty date: July 28, 2017
Submitted: July 31, 2017
Operation: Air carrier
Aircraft: N453AS
Make and model: Boeing 737990ER
Aircraft serial: 36354
Aircraft time: 14,030 hours, 4,613 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Fan
Condition: Disconnected
Location: Temp Sensor
Stage of operation: NR
How discovered: O
Nature of condition: W
Precautionary procedure: O

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

What was found

AFT PAX CABIN VERY HOT DESPITE TEMP GAUGE SHOWING SAME 23C AS FWD CABIN. IT TAKES AFT CABIN CONTROLLER FULL COLD TO MANAGE AFT CABIN PAX. DUCT PRESSURE NORMAL. ACFT GROUNDED. FOUND THE AFT CABIN TEMP SENSOR FAN NOT WORKING. DROPPED FAN ACCESS PANEL AND FOUND FAN DISCONNECTED. CONNECTED THE FAN & OPS CHECKED NORMAL IAW AMM 21-61-11. BITE OF BOTH CONTROLLERS, OPS NORMAL.