As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, RADAR RETURN WHEN TILT ADJUSTED TO PAINT ANY RETURN. PAINTED FROM 9-10 O' CLOCK AND 2-3 O'CLOCK, BUT NOTHING IN BETWEEN. LATER WHEN MANEUVERING, RETURN WAS FROM 1-3 O'CLOCK AND REMAINED THAT WAY FOR 5 MIN. THEREAFTER RETURNS WENT BACK TO FIRST CONDITION. REPLACED RADAR R/T PER MM 34-40, SYSTEM OPS CHECK GOOD ON GROUND.