Narrative:

[We] embarked with normal takeoff indications; normal callouts until pilot not flying called '70 crosscheck'; pilot flying was indicating a positive airspeed around 40-50 KIAS. By the time [we] realized one indication was inaccurate the aircraft was at rotation speed and the decision was made [to] takeoff and immediate return to land. Decision for takeoff was predicated with runway in use short length of 5;500 ft. After takeoff pilot not flying (first officer) had normal indications and announced 'my controls'. Normal return to land was made from the co-pilot side where the pilot not flying safely returned the aircraft via left closed traffic. Indications in the air were: autopilot fail; Y/D fail; engine no dispatch and IAS mis-compare. Upon landing; indications were extinguished. Upon initial inspection maintenance discovered FOD (bug) noted in left static line. Maintenance cleared static lines and faults were corrected.

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Original NASA ASRS Text

Title: An E500 First Officer reported Captain's airspeed indicator erroneous after takeoff. Flight returned for an immediate landing where a bug was found in the left pitot tube.

Narrative: [We] embarked with normal takeoff indications; normal callouts until pilot not flying called '70 crosscheck'; pilot flying was indicating a positive airspeed around 40-50 KIAS. By the time [we] realized one indication was inaccurate the aircraft was at rotation speed and the decision was made [to] takeoff and immediate return to land. Decision for takeoff was predicated with runway in use short length of 5;500 FT. After takeoff pilot not flying (First Officer) had normal indications and announced 'my controls'. Normal return to land was made from the co-pilot side where the pilot not flying safely returned the aircraft via left closed traffic. Indications in the air were: autopilot fail; Y/D fail; engine no Dispatch and IAS mis-compare. Upon landing; indications were extinguished. Upon initial inspection Maintenance discovered FOD (bug) noted in left static line. Maintenance cleared static lines and faults were corrected.

Data retrieved from NASA's ASRS site as of April 2012 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.