SDR DXTA200702445

Service difficulty report · A/C Pack · Cessna 750

Difficulty date: September 3, 2007
Submitted: September 5, 2007
Operation: Air carrier
Aircraft: N948QS
Make and model: Cessna 750
Aircraft serial: 7500149
Aircraft time: 6,228 hours, 3,809 cycles
Engine: Allsn AE3007C
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Odor
Stage of operation: CR
How discovered: O
Nature of condition: B
Precautionary procedure: O

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

What was found

COCKPIT PAC TEMPERATURE IS UNCONTROLLABLE AND PRODUCES A BURNING / SULFUR TYPE ODOR. TROUBLESHOT SYSTEM. FOUND ACM AND TEMPERATURE CONTROL VALVES INOP. TEMP. CONTROL VALVE REMOVED PN 27241287-10, SN 10AT77. INSTALLED O/H PN 27241287, SN 4AR32. ACM REMOVED AND INSTALLED IAW CE750 MM CHAPTER 21-51-00 OPERATIONS CHECK GOOD. TEMP CONTROL VALVE REMOVAL AND INSTALLATION IAW CE750 MM CHAPTER 21-61-00. OPS CHECK GOOD. NO FURTHER DEFECTS AT THIS TIME.

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