SDR ASAA0956821

Service difficulty report · Filter · Boeing 737890

Difficulty date: October 19, 2009
Submitted: October 21, 2009
Operation: Air carrier
Aircraft: N579AS
Make and model: Boeing 737890
Aircraft serial: 35187
Aircraft time: 10,216 hours, 3,026 cycles
System (JASC): 2120 · Air Distribution System
Part: Filter
Part number: 412A160041
Condition: Dirty
Location: Cabin
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

OVERHEAD "AFT CABIN" TEMP CONTROL REQUIRES ABNORMAL POSITION (FAR HOTTER THAN NORM) TO MAINTAIN TEMP. ALSO AFT CABIN TEMP INDICATES 28 30 DEGREES C AND F/A'S STILL REPORTING COLD. FOUND AFT CABIN TEMP FILTER VERY DIRTY. CLEANED AFT CABIN TEMP SENSOR AFT CABIN TEMP BULB AND FILTER REF MM 21 61 10. PACK/ZONE TEMP CONTROLLERS REVEALED NO FAULTS. OPS CHECK OF CABIN TEMP CTRL AND INDICATION NML REF MM 21 61 00.