As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED A VIBRATION AT AND JUST PRIOR TO ROTATION. RED INTRANSIT LIGHT CAME ON, FLY BY INDICATED THAT THE LT MLG WAS NOT FULLY RETRACTED. GEAR LOWERED AND A/C LANDED. THE HEAD AND A .75 INCH OF BOLT FOUND ON RUNWAY. LT MLG UPPER TORQUE LINK BOLT REPLACED.