Challenger cl-601 flight crew has smoke in cabin/cockpit during cruise.

Attributes
ACN	724787
Time
Date	200701
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zny.artcc
State Reference	NY
Altitude	msl single value : 40000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Challenger CL601
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Route In Use	enroute airway : a300.airway
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 70 flight time total : 5200 flight time type : 350
ASRS Report	724787
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While en route we experienced HF communication loss and soon thereafter the ceo advised of smoke in the lavatory. About ten minutes into the HF communication issue; the ceo came up and advised of smoke in the lavatory. I advised my other crew member to go and find out what was going on. He confirmed that there was smoke in the lav; and about the same time I could smell the smoke in the flight deck. I then immediately turned off all power to the rear of the aircraft. I then proceeded to pull all circuit breaker's to the lavatory for extra safety measure. The other crewmember advised that the smoke had stopped a short time later and continued to investigate. It appeared to be the lavatory hot water heater overheated and thus caused the insulating blanket to get extremely hot and begin to melt. Because of the fact that we were fairly certain that we had located the source of the problem we chose to continue to the destination airport and landed without incident. The above was relayed via sat phone; however an emergency was not declared. We finally were able to once again communicate on HF just prior to entering san juan's airspace.

Original NASA ASRS Text

Title: CHALLENGER CL-601 FLT CREW HAS SMOKE IN CABIN/COCKPIT DURING CRUISE.

Narrative: WHILE ENRTE WE EXPERIENCED HF COMMUNICATION LOSS AND SOON THEREAFTER THE CEO ADVISED OF SMOKE IN THE LAVATORY. ABOUT TEN MINUTES INTO THE HF COMMUNICATION ISSUE; THE CEO CAME UP AND ADVISED OF SMOKE IN THE LAVATORY. I ADVISED MY OTHER CREW MEMBER TO GO AND FIND OUT WHAT WAS GOING ON. HE CONFIRMED THAT THERE WAS SMOKE IN THE LAV; AND ABOUT THE SAME TIME I COULD SMELL THE SMOKE IN THE FLT DECK. I THEN IMMEDIATELY TURNED OFF ALL POWER TO THE REAR OF THE ACFT. I THEN PROCEEDED TO PULL ALL CB'S TO THE LAVATORY FOR EXTRA SAFETY MEASURE. THE OTHER CREWMEMBER ADVISED THAT THE SMOKE HAD STOPPED A SHORT TIME LATER AND CONTINUED TO INVESTIGATE. IT APPEARED TO BE THE LAVATORY HOT WATER HEATER OVERHEATED AND THUS CAUSED THE INSULATING BLANKET TO GET EXTREMELY HOT AND BEGIN TO MELT. BECAUSE OF THE FACT THAT WE WERE FAIRLY CERTAIN THAT WE HAD LOCATED THE SOURCE OF THE PROB WE CHOSE TO CONTINUE TO THE DEST ARPT AND LANDED WITHOUT INCIDENT. THE ABOVE WAS RELAYED VIA SAT PHONE; HOWEVER AN EMER WAS NOT DECLARED. WE FINALLY WERE ABLE TO ONCE AGAIN COMMUNICATE ON HF JUST PRIOR TO ENTERING SAN JUAN'S AIRSPACE.

Data retrieved from NASA's ASRS site as of January 2009 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.