Service difficulty report · Sensor · Boeing 737990ER

Difficulty date
June 19, 2018
Submitted
June 20, 2018
Operation
Air carrier
Aircraft
N491AS
Make and model
Boeing 737990ER
Aircraft serial
44109
Aircraft time
10,405 hours, 3,517 cycles
Part
Sensor
Part number
6240181
Condition
Dirty
Location
Cabin Temp
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

FWD AND AFT TEMP CONTROLLERS APPEAR TO NEED SOME CALIBRATION WHEN OPERATED IN AUTO, WITH FWD AND AFT TEMP CONTROLLERS SET AT 9 AND 9:30 RESPECTIVELY THE CABIN TEMP IS ABOUT NORMAL (USUALLY THEY WOULD BE AT APPROXIMATELY THE 12 OCLOCK POSITION FOR THE SAME RESULT. GROUNDED - YES. CLEANED FWD AND AFT CABIN TEMP SENSOR PER AMM 21-61-06 OPS CHECK GOOD.