Corporate flight crew reported they departed with a pitot tube cover still attached.

Attributes
ACN	1634259
Time
Date	201904
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Falcon 2000
Operating Under FAR Part	Part 135
Flight Phase	Takeoff
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Other / Unknown

Narrative:

The pilot's pitot cover (upper) was placed in position without a streamer attached. It was not discovered still in place by both pilots during preflight walk around. I was pilot monitoring in the right seat. In the takeoff roll at approximately 80 knots I called out no airspeed on the left side. Pilot ffying after processing my call out continued the takeoff rather than executing a high speed abort. Once airborne; we notified ATC that we had an instrumentation issue and we had to return to the airport. The landing was normal.three main take-aways I got from this are never put a cover on that doesn't have a streamer attached. Be more aware and less complacent during the preflight walk around and finally; at 80 knots instead of calling out the problem; I should have simply called for an abort.

Original NASA ASRS Text

Title: Corporate flight crew reported they departed with a Pitot Tube cover still attached.

Narrative: The pilot's pitot cover (upper) was placed in position without a streamer attached. It was not discovered still in place by both pilots during preflight walk around. I was Pilot Monitoring in the right seat. In the takeoff roll at approximately 80 knots I called out no airspeed on the left side. Pilot Ffying after processing my call out continued the takeoff rather than executing a high speed abort. Once airborne; we notified ATC that we had an instrumentation issue and we had to return to the airport. The landing was normal.Three main take-aways I got from this are never put a cover on that doesn't have a streamer attached. Be more aware and less complacent during the preflight walk around and finally; at 80 knots instead of calling out the problem; I should have simply called for an abort.

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.