A C560XL crew, departing bzn, misinterped their departure instructions as being their departure clea...

Attributes
ACN	554397
Time
Date	200207
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bzn.airport
State Reference	MT
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Citation Excel
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll ground : position and hold
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 18500 flight time type : 600
ASRS Report	554397
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	incursion : runway non adherence : clearance non adherence other other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued alert
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared to taxi to runway 30 and given our departure clearance. We were told to hold short of runway 30 which we did. Tower then told us 'taxi into position and hold runway 30, can you take a VFR climb?' we said 'yes.' tower said 'you are cleared to climb to FL210, contact ZLC on frequency 132.4 passing through 15000 ft. First officer was flying and I read back clearance and assumed I was cleared for takeoff, which we did. On climb out, tower told us we were supposed to hold in position.

Original NASA ASRS Text

Title: A C560XL CREW, DEPARTING BZN, MISINTERPED THEIR DEP INSTRUCTIONS AS BEING THEIR DEP CLRNC.

Narrative: WE WERE CLRED TO TAXI TO RWY 30 AND GIVEN OUR DEP CLRNC. WE WERE TOLD TO HOLD SHORT OF RWY 30 WHICH WE DID. TWR THEN TOLD US 'TAXI INTO POS AND HOLD RWY 30, CAN YOU TAKE A VFR CLB?' WE SAID 'YES.' TWR SAID 'YOU ARE CLRED TO CLB TO FL210, CONTACT ZLC ON FREQ 132.4 PASSING THROUGH 15000 FT. FO WAS FLYING AND I READ BACK CLRNC AND ASSUMED I WAS CLRED FOR TKOF, WHICH WE DID. ON CLBOUT, TWR TOLD US WE WERE SUPPOSED TO HOLD IN POS.

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.

A C560XL crew, departing bzn, misinterped their departure instructions as being their departure clearance.