As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BTV-BOS - FLT 4691 - THE CREW REPORTED F/O AIRSPEED READING LOW AND THE AIRCRAFT DIVERTED BACK TO BTV. MAINTENANCE FOUND THE RIGHT PITOT COVER STILL INSTALLED ON THE PITOT TUBE. MAINTENANCE REMOVED THE RT PITOT TUBE COVER, INSPECTED THE TUBE FOR DAMAGE AND THE AIRCRAFT WAS RETURNED TO SERVICE. (M)