RA390 pilot misses altitude level off while changing frequencys.

Attributes
ACN	746438
Time
Date	200707
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : teb.airport
State Reference	NJ
Altitude	msl bound lower : 1500 msl bound upper : 1700
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tower : teb.tower
Operator	general aviation : corporate
Make Model Name	Premier 1
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Route In Use	departure sid : teb
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 55 flight time total : 12000 flight time type : 300
ASRS Report	746438
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure
Primary Problem	Flight Crew Human Performance

Narrative:

After takeoff; I was instructed to switch over to departure control. I was unable to activate departure frequency. The departure frequency was stored in the CDU; but would not activate. After trying to troubleshoot the problem; I advised tower of my problem. Just after that transmission I discovered the problem. At that time I was 200 ft above my assigned altitude and was able to make contact with departure control. The rest of the flight was normal. The problem with the radio was a transient letter in the data pad that disabled the frequency capability of the unit. I did not enter it and I have seen this happen en route; but en route is not as busy and easily solved.

Original NASA ASRS Text

Title: RA390 PLT MISSES ALT LEVEL OFF WHILE CHANGING FREQS.

Narrative: AFTER TKOF; I WAS INSTRUCTED TO SWITCH OVER TO DEP CTL. I WAS UNABLE TO ACTIVATE DEP FREQ. THE DEP FREQ WAS STORED IN THE CDU; BUT WOULD NOT ACTIVATE. AFTER TRYING TO TROUBLESHOOT THE PROB; I ADVISED TOWER OF MY PROB. JUST AFTER THAT TRANSMISSION I DISCOVERED THE PROB. AT THAT TIME I WAS 200 FT ABOVE MY ASSIGNED ALT AND WAS ABLE TO MAKE CONTACT WITH DEP CTL. THE REST OF THE FLT WAS NORMAL. THE PROB WITH THE RADIO WAS A TRANSIENT LETTER IN THE DATA PAD THAT DISABLED THE FREQ CAPABILITY OF THE UNIT. I DID NOT ENTER IT AND I HAVE SEEN THIS HAPPEN ENRTE; BUT ENRTE IS NOT AS BUSY AND EASILY SOLVED.

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.