What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Mechanic stated that he was taxiing the aircraft to the customer's hangar (1.1 miles distance) after maintenance was completed. Taxi way was covered in ice and packed snow. Mechanic stated that he was probably taxiing too fast when aircraft drifted towards the left side of the taxiway. The mechanic reduced power and applied counter right rudder which had no effect. Aircraft ground looped to the left and came to a rest facing left perpendicular to the taxiway against a snow bank. The right wing tip struck an adjacent parked aircraft on the lower left engine cowl and the propeller. Incident aircraft sustained damage to the leading edge of the right wing near the tip. A coworker behind the taxiing aircraft, witnessed the incident and stated that his speed was approximately 10-15 mph while following the aircraft.
As the FAA filed it
MECHANIC STATED THAT HE WAS TAXIING THE AIRCRAFT TO THE CUSTOMER'S HANGAR (1.1 MILES DISTANCE) AFTER MAINTENANCE WAS COMPLETED. TAXI WAY WAS COVERED IN ICE AND PACKED SNOW. MECHANIC STATED THAT HE WAS PROBABLY TAXIING TOO FAST WHEN AIRCRAFT DRIFTED TOWARDS THE LEFT SIDE OF THE TAXIWAY. THE MECHANIC REDUCED POWER AND APPLIED COUNTER RIGHT RUDDER WHICH HAD NO EFFECT. AIRCRAFT GROUND LOOPED TO THE LEFT AND CAME TO A REST FACING LEFT PERPENDICULAR TO THE TAXIWAY AGAINST A SNOW BANK. THE RIGHT WING TIP STRUCK AN ADJACENT PARKED AIRCRAFT ON THE LOWER LEFT ENGINE COWL AND THE PROPELLER. INCIDENT AIRCRAFT SUSTAINED DAMAGE TO THE LEADING EDGE OF THE RIGHT WING NEAR THE TIP. A COWORKER BEHIND THE TAXIING AIRCRAFT, WITNESSED THE INCIDENT AND STATED THAT HIS SPEED WAS APPROXIMATELY 10-15 MPH WHILE FOLLOWING THE AIRCRAFT.