Narrative:

We contacted manassas tower and were cleared to enter a downwind pattern with left turns to runway 34L. We were cleared to land on runway 34L and to the west parking area. We exited the runway at the end, turning left on taxiway a. We stopped beyond taxiway turnoff T2, called ground control and asked for clearance to the parking area of the comanches on the east ramp. The controller was unaware of any parking area for comanches, but cleared us to the east ramp. We taxied to turnoff taxiway A1 and turned 180 degrees and continued to taxi north and east on taxiway a, stopping short of runway 16. I called ground control and asked for clearance to cross runway 16. I received no reply from ground control. There was no activity on the runway and after some further hesitation concluded that the clearance included crossing the end of runways 16L and 16R. The comanche society had scheduled training sessions at an FBO on sat and sun. While taxiing to the FBO parking area where the comanches were parked, the ground controller called and directed me to contact the tower after parking. The controller told me that I had crossed 2 runways without a proper clearance. He further commented that no one had contacted him or reported any inconvenience or concern to him, but that I would be written up for the incursions. The manassas airport environment is a step up from the leesburg airport which I use quite frequently. The dubois, leesburg and the majority of the airports I use are non-twred, advisories only. The major airports I use are usually staffed with 'in command' personnel, the language and delivery are clear, concise and mostly understandable. I believe this problem arose because I did not adapt to the tower control atmosphere at manassas. The tower/ground controller gave the impression of being uncomfortable in his position. I was in no rush to taxi from the runway to the comanche parking area. I did not knowingly do anything that would be considered an unsafe operating practice.

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Original NASA ASRS Text

Title: PA30, TWIN COMANCHE PLT TAXIES ACROSS PARALLEL RWYS WHEN CLRED TO RAMP AREA.

Narrative: WE CONTACTED MANASSAS TWR AND WERE CLRED TO ENTER A DOWNWIND PATTERN WITH L TURNS TO RWY 34L. WE WERE CLRED TO LAND ON RWY 34L AND TO THE W PARKING AREA. WE EXITED THE RWY AT THE END, TURNING L ON TXWY A. WE STOPPED BEYOND TXWY TURNOFF T2, CALLED GND CTL AND ASKED FOR CLRNC TO THE PARKING AREA OF THE COMANCHES ON THE E RAMP. THE CTLR WAS UNAWARE OF ANY PARKING AREA FOR COMANCHES, BUT CLRED US TO THE E RAMP. WE TAXIED TO TURNOFF TXWY A1 AND TURNED 180 DEGS AND CONTINUED TO TAXI N AND E ON TXWY A, STOPPING SHORT OF RWY 16. I CALLED GND CTL AND ASKED FOR CLRNC TO CROSS RWY 16. I RECEIVED NO REPLY FROM GND CTL. THERE WAS NO ACTIVITY ON THE RWY AND AFTER SOME FURTHER HESITATION CONCLUDED THAT THE CLRNC INCLUDED XING THE END OF RWYS 16L AND 16R. THE COMANCHE SOCIETY HAD SCHEDULED TRAINING SESSIONS AT AN FBO ON SAT AND SUN. WHILE TAXIING TO THE FBO PARKING AREA WHERE THE COMANCHES WERE PARKED, THE GND CTLR CALLED AND DIRECTED ME TO CONTACT THE TWR AFTER PARKING. THE CTLR TOLD ME THAT I HAD CROSSED 2 RWYS WITHOUT A PROPER CLRNC. HE FURTHER COMMENTED THAT NO ONE HAD CONTACTED HIM OR RPTED ANY INCONVENIENCE OR CONCERN TO HIM, BUT THAT I WOULD BE WRITTEN UP FOR THE INCURSIONS. THE MANASSAS ARPT ENVIRONMENT IS A STEP UP FROM THE LEESBURG ARPT WHICH I USE QUITE FREQUENTLY. THE DUBOIS, LEESBURG AND THE MAJORITY OF THE ARPTS I USE ARE NON-TWRED, ADVISORIES ONLY. THE MAJOR ARPTS I USE ARE USUALLY STAFFED WITH 'IN COMMAND' PERSONNEL, THE LANGUAGE AND DELIVERY ARE CLR, CONCISE AND MOSTLY UNDERSTANDABLE. I BELIEVE THIS PROB AROSE BECAUSE I DID NOT ADAPT TO THE TWR CTL ATMOSPHERE AT MANASSAS. THE TWR/GND CTLR GAVE THE IMPRESSION OF BEING UNCOMFORTABLE IN HIS POS. I WAS IN NO RUSH TO TAXI FROM THE RWY TO THE COMANCHE PARKING AREA. I DID NOT KNOWINGLY DO ANYTHING THAT WOULD BE CONSIDERED AN UNSAFE OPERATING PRACTICE.

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.