SDR USAA2013070500025

Service difficulty report · Sensor · Boeing 7572B7

Difficulty date: July 1, 2013
Submitted: July 6, 2013
Operation: Air carrier
Aircraft: N936UW
Make and model: Boeing 7572B7
Aircraft serial: 27244
Aircraft time: 62,099 hours, 24,623 cycles
System (JASC): 2163 · Cabin Temperature Sensor
Part: Sensor
Condition: Dirty
Location: Cockpit
Stage of operation: CL
How discovered: O
Nature of condition: B
Precautionary procedure: H

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

What was found

EN-ROUTE, FLIGHT DECK TRIM AIR GOES HOT ON CLIMBOUT (31 DEG C) BURNED OFF AT CRUISE, TURNED TRIM AIR BACK ON, TRIM AIR WENT HOT AGAIN, WITH DISTINCT SMELL OF DUCTWORK. TURNED FLIGHT DECK TRIM AIR OFF, LEFT OFF. MX FOUND COCKPIT TEMP SENSOR EXTREMELY DIRTY. CLEANED SENSOR, OPS CHECKS GOOD.

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