ACR MLG HAS LOSS OF 1 AIRSPD INDICATOR ON TKOF.

Narrative

THE FO WAS FLYING. ON THE TKOF ROLL; I CALLED '80 KTS.' FO SAID ' I HAVE NO AIRSPD; CALL V1.' I CALLED V1 AND VR. ROTATION AND LIFT OFF WERE NORMAL. WITH A POSITIVE RATE; FO CALLED 'GEAR UP' -- I RAISED THE GEAR AND FO ESTABLISHED A NORMAL CLB. AT 500 FT AGL; I SWITCHED THE CADC SWITCH TO BOTH ON 1 -- FO AIRSPD RETURNED. REST OF FLT WAS NORMAL. AT DEST; MAINT FOUND PITOT HOSE DISCONNECTED FROM CADC 2. DECISION TO CONTINUE TKOF WAS BASED ON FAVORABLE CONDITIONS AND THE EXPERIENCE LEVEL OF BOTH PLTS -- COMBINED WITH SYS KNOWLEDGE. CAPT'S INSTS AND STANDBY AIRSPD INDICATOR WERE NORMAL. THE FO WAS A 10000 HR PLT WITH LOTS OF R SEAT INSTRUCTOR TIME AND WAS FAMILIAR WITH CROSS COCKPIT INST SCAN. THIS FORM SUBMITTED BECAUSE A LOGBOOK ENTRY WAS MADE AND AN INVESTIGATION IS UNDERWAY TO DETERMINE IF THE #2 CADC WAS TAMPERED WITH DUE TO STRAINED LABOR RELATIONS AND ANIMOSITY TOWARD THE COMPANY AND THE PLTS FROM MAINT. SUPPLEMENTAL INFO FROM ACN 210824: AT THE 80 KT CALL I SAID I HAD NO AIRSPD AND ASKED THE CAPT TO BE SURE TO CALL SPDS FOR ME. (AND I PICKED HIS AIRSPD UP ON MY SCAN). MY AIRSPD THEN WAS NORMAL SO WE ELECTED TO CONTINUE OUR RTE (THE RTE AND DEST WX WAS GOOD). ON CLB THE R AIR DATA SYS CLBED AND WENT OVERSPD GIVING A FALSE WARNING WHICH WE EVENTUALLY CANCELLED; BUT IT DROVE US NUTS AT A BUSY TIME WITH ATC.