As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE CUSTOMER REPORTED THAT ON MARCH 25, EXPERIENCED A NR DROOP TO 96%. TROUBLESHOOTING FOUND NO CAUSE OR REPEATABILITY. ON MARCH 27 AFTER THREE FLIGHTS IT DROOPED AGAIN. ACFT IS GNDED AT THIS TIME. THE FIELD SERVICE REPRESENTATIVE WAS CALLED TO SUPPORT THE TROUBLESHOOTING.