BE33 departs gyr without ATC clearance.

Attributes
ACN	598022
Time
Date	200310
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : gyr.airport
State Reference	AZ
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : gyr.tower
Operator	general aviation : instructional
Make Model Name	Bonanza 33
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff ground : takeoff roll
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : trainee
Qualification	pilot : student
Experience	flight time last 90 days : 67 flight time total : 82 flight time type : 62
ASRS Report	598022
Person 2
Affiliation	other
Function	controller : local
Events
Anomaly	non adherence : clearance non adherence other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Takeoff without clearance. Tower controller cleared me into position and hold, but I took off. On that day I had my first 'night flying traffic pattern solo' at a controled airport. Before the incident I'd already performed 4 traffic pattern with 'full stop taxi back.' due to traffic in the traffic pattern and additional traffic arriving the traffic pattern, I misunderstood the clearance the tower controller gave me.

Original NASA ASRS Text

Title: BE33 DEPARTS GYR WITHOUT ATC CLRNC.

Narrative: TKOF WITHOUT CLRNC. TWR CTLR CLRED ME INTO POS AND HOLD, BUT I TOOK OFF. ON THAT DAY I HAD MY FIRST 'NIGHT FLYING TFC PATTERN SOLO' AT A CTLED ARPT. BEFORE THE INCIDENT I'D ALREADY PERFORMED 4 TFC PATTERN WITH 'FULL STOP TAXI BACK.' DUE TO TFC IN THE TFC PATTERN AND ADDITIONAL TFC ARRIVING THE TFC PATTERN, I MISUNDERSTOOD THE CLRNC THE TWR CTLR GAVE ME.

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.