SDR DXTA200300131

Service difficulty report · Controller · Cessna 750

Difficulty date: September 29, 2003
Submitted: October 16, 2003
Operation: Air carrier
Aircraft: N900QS
Make and model: Cessna 750
Aircraft serial: 7500123
Aircraft time: 2,971 hours, 1,897 cycles
System (JASC): 2131 · Cabin Pressure Controller
Part: Controller
Condition: Failed
Location: Cabin Temp
Part time: 2,971 hours, 1,897 cycles
Stage of operation: CR
How discovered: O
Nature of condition: M, J
Precautionary procedure: A

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

What was found

WHILE CLIMBING THROUGH FL330 THE COCKPIT TEMP CIRCUIT BREAKER POPPED, COCKPIT AIR-CONDITIONING PAC WOULD NOT STOP BLOWING HOT AIR. EICAS WARNING “DU-HOT” ILLUMINATED, AFTER LOSING DU 1 & 2 ELECTED TO DIVERT INTO LBL. DURING DESCENT INTO LBL STARTED LOSING DU 4 & 5, EMERGENCY DECLARED. - CHECKED CIRCUIT BREAKER AND WIRING, ALL CHECKED GOOD, RAN AIRCRAFT WITH APU AND BOTH ENGINES ALL CHECKED GOOD. REPLACED TEMP CONTROLLER AND SENSOR AS PRECAUTIONARY, OPS CHECKED GOOD IAW CESSNA 750 MM CHAPTER 21-00

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