Air taxi first officer; the pilot monitoring; reported captain inadvertently taxied over hold short ...

Attributes
ACN	1600863
Time
Date	201812
Local Time Of Day	0601-1200
Place
Locale Reference	VNY.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 135
Flight Phase	Taxi
Route In Use	None
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 10200 Flight Crew Type 200
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Ground Incursion Runway

Narrative:

The tower and ground facility were extremely congested. While holding short of the runway; next in line to depart; tower began to issue a new departure clearance to our aircraft. As soon as the new clearance was being transmitted the frequency was 'stepped over' by other aircraft. As the sic (second in command) I was handling the communication from the aircraft and advised ATC I had only copied part of the clearance in the meantime the PIC (pilot in command) had taxied the aircraft forward partially onto the runway. I advised the PIC I had not received a takeoff clearance; we stopped the aircraft; clarified with ATC that we were not cleared for takeoff. We advised ATC of our position partially on the runway; and they issued a clearance to cross the runway and turn around. Shortly thereafter we departed and the rest of the flight was without incident.

Original NASA ASRS Text

Title: Air Taxi First Officer; the pilot monitoring; reported Captain inadvertently taxied over hold short line without clearance at VNY airport.

Narrative: The tower and ground facility were extremely congested. While holding short of the runway; next in line to depart; tower began to issue a new departure clearance to our aircraft. As soon as the new clearance was being transmitted the frequency was 'stepped over' by other aircraft. As the SIC (Second in Command) I was handling the communication from the aircraft and advised ATC I had only copied part of the clearance in the meantime the PIC (Pilot in Command) had taxied the aircraft forward partially onto the runway. I advised the PIC I had not received a takeoff clearance; we stopped the aircraft; clarified with ATC that we were not cleared for takeoff. We advised ATC of our position partially on the runway; and they issued a clearance to cross the runway and turn around. Shortly thereafter we departed and the rest of the flight was without incident.

Data retrieved from NASA's ASRS site 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.

Air taxi first officer; the pilot monitoring; reported captain inadvertently taxied over hold short line without clearance at vny airport.