Challenger CL601 flight crew has an altitude deviation during the teb 5 departure.

Attributes
ACN	728605
Time
Date	200702
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : teb.airport
State Reference	NJ
Altitude	msl bound lower : 6000 msl bound upper : 6400
Environment
Flight Conditions	Mixed
Weather Elements	Ice
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon tracon : n90.tracon
Operator	general aviation : corporate
Make Model Name	Challenger CL601
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : teb
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 18000 flight time type : 3000
ASRS Report	728605
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : returned to original clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Weather Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were told to turn to 220 degrees and climb to 6000 ft. I was the PF and missed part of the radio call from control as I was turning and climbing and looking for traffic. My first officer read back to the controller climb to FL220 and turned the altitude pre select to 22000 ft. I thought we had been cleared to that altitude and started a rapid climb to get out of the icing conditions as soon as possible. As we were climbing through 6000 ft the controller called and asked us what altitude we were climbing to and the first officer said FL220. The controller asked us where we got that clearance and he replied that is what he heard and that is what he read back with no negative reply so we climbed. The controller at that point told us to level at 6000 ft but I was already at 6200 ft and climbing. I immediately leveled off and started a descent back to 6000 ft. As far as we know there was no conflict with other traffic and the highest I was when leveling off was 6400 ft before starting descent. This was a total failure to communication and to question a clearance like none other we had ever received out of teb. Learned that when things are not as they normally are question and check before proceeding.

Original NASA ASRS Text

Title: CHALLENGER CL601 FLT CREW HAS AN ALT DEV DURING THE TEB 5 DEP.

Narrative: WE WERE TOLD TO TURN TO 220 DEGS AND CLB TO 6000 FT. I WAS THE PF AND MISSED PART OF THE RADIO CALL FROM CTL AS I WAS TURNING AND CLBING AND LOOKING FOR TFC. MY FO READ BACK TO THE CTLR CLB TO FL220 AND TURNED THE ALTITUDE PRE SELECT TO 22000 FT. I THOUGHT WE HAD BEEN CLRED TO THAT ALT AND STARTED A RAPID CLB TO GET OUT OF THE ICING CONDITIONS AS SOON AS POSSIBLE. AS WE WERE CLBING THROUGH 6000 FT THE CTLR CALLED AND ASKED US WHAT ALT WE WERE CLBING TO AND THE FO SAID FL220. THE CTLR ASKED US WHERE WE GOT THAT CLRNC AND HE REPLIED THAT IS WHAT HE HEARD AND THAT IS WHAT HE READ BACK WITH NO NEGATIVE REPLY SO WE CLBED. THE CTLR AT THAT POINT TOLD US TO LEVEL AT 6000 FT BUT I WAS ALREADY AT 6200 FT AND CLBING. I IMMEDIATELY LEVELED OFF AND STARTED A DSCNT BACK TO 6000 FT. AS FAR AS WE KNOW THERE WAS NO CONFLICT WITH OTHER TFC AND THE HIGHEST I WAS WHEN LEVELING OFF WAS 6400 FT BEFORE STARTING DESCENT. THIS WAS A TOTAL FAILURE TO COM AND TO QUESTION A CLRNC LIKE NONE OTHER WE HAD EVER RECEIVED OUT OF TEB. LEARNED THAT WHEN THINGS ARE NOT AS THEY NORMALLY ARE QUESTION AND CHECK BEFORE PROCEEDING.

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.