<< >> NASA ASRS Report 632148, August 2004

A cpr CL60 flight crew diverts to ZZZ after multiple system problems including a possible APU fire occurs shortly after their departure from fok.

Attributes
ACN	632148
Time
Date	200408
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl bound lower : 13000 msl bound upper : 17000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc tower : dfw.tower
Operator	general aviation : corporate
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4000 flight time type : 1300
ASRS Report	632148
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly
Independent Detector	aircraft equipment other aircraft equipment : acy, adi, apy warning other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : diverted to another airport flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

Departing fok in MVFR conditions. Takeoff was normal and climb was normal until we had an acu (acceleration control unit) over-pressure and a pilot side ADI fail. I was the PF and xferred controls to the copilot. At about 13000 ft in the climb over ny we had a burning smell in the cabin, then an APU fire warning and APU shutdown. At that point we declared an emergency and decided to divert to ZZZ about 15-20 mi away. We were in VFR and pointed the aircraft down toward ZZZ due to the fact we thought we had an APU fire on board. The copilot was flying and I continued to run checklists and check circuit breakers. We landed with no issues and the aircraft was checked by maintenance personnel.

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Original NASA ASRS Text

Title: A CPR CL60 FLT CREW DIVERTS TO ZZZ AFTER MULTIPLE SYS PROBS INCLUDING A POSSIBLE APU FIRE OCCURS SHORTLY AFTER THEIR DEP FROM FOK.

Narrative: DEPARTING FOK IN MVFR CONDITIONS. TKOF WAS NORMAL AND CLB WAS NORMAL UNTIL WE HAD AN ACU (ACCELERATION CTL UNIT) OVER-PRESSURE AND A PLT SIDE ADI FAIL. I WAS THE PF AND XFERRED CTLS TO THE COPLT. AT ABOUT 13000 FT IN THE CLB OVER NY WE HAD A BURNING SMELL IN THE CABIN, THEN AN APU FIRE WARNING AND APU SHUTDOWN. AT THAT POINT WE DECLARED AN EMER AND DECIDED TO DIVERT TO ZZZ ABOUT 15-20 MI AWAY. WE WERE IN VFR AND POINTED THE ACFT DOWN TOWARD ZZZ DUE TO THE FACT WE THOUGHT WE HAD AN APU FIRE ON BOARD. THE COPLT WAS FLYING AND I CONTINUED TO RUN CHKLISTS AND CHK CIRCUIT BREAKERS. WE LANDED WITH NO ISSUES AND THE ACFT WAS CHKED BY MAINT PERSONNEL.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.