Atx lear 36 takes off sbd without release from ATC.

Attributes
ACN	436030
Time
Date	199904
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : sbd.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air taxi
Make Model Name	Learjet 36
Operating Under FAR Part	Part 135
Flight Phase	climbout : takeoff ground : takeoff roll
Route In Use	departure : vfr
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : multi engine pilot : cfi
Experience	flight time last 90 days : 105 flight time total : 14700 flight time type : 2300
ASRS Report	436030
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	airspace violation : entry non adherence : clearance non adherence : far
Independent Detector	other controllera
Resolutory Action	controller : provided flight assist none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

This incident occurred while departing sbd. Copilot PF on this leg stated we received clearance and were ready to go. After takeoff I called ATC to advise we had departed. ATC stated we had not been released. Captain should always check specifics prior to takeoff. I have since changed my own procedure to insure this not happening again.

Original NASA ASRS Text

Title: ATX LEAR 36 TAKES OFF SBD WITHOUT RELEASE FROM ATC.

Narrative: THIS INCIDENT OCCURRED WHILE DEPARTING SBD. COPLT PF ON THIS LEG STATED WE RECEIVED CLRNC AND WERE READY TO GO. AFTER TKOF I CALLED ATC TO ADVISE WE HAD DEPARTED. ATC STATED WE HAD NOT BEEN RELEASED. CAPT SHOULD ALWAYS CHK SPECIFICS PRIOR TO TKOF. I HAVE SINCE CHANGED MY OWN PROC TO INSURE THIS NOT HAPPENING AGAIN.

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.