What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) N923XJ, CL-600-2D4, was operated by mesaba airlines as flight 3612. The aircraft was en route from minneapolis, MN to Colorado springs, CO, when the crew received a hydraulic high temperature indication. The crew diverted to Lincoln, NE. Maintenance checked the nr 3 hydraulic system quantity, and temperature, which was normal. The filter and components had no leaks nor had the bypass pin popped. The aircraft was approved for a ferry flight to minneapolis, MN. Company mechanics replaced the nr 3 reservoir, suspecting that the boot strap cylinder inside the nr 3 reservoir was leaking fluid back into the main reservoir, causing the high temperature indication. The aircraft was returned to service.
As the FAA filed it
(-23) N923XJ, CL-600-2D4, WAS OPERATED BY MESABA AIRLINES AS FLIGHT 3612. THE AIRCRAFT WAS EN ROUTE FROM MINNEAPOLIS, MN TO COLORADO SPRINGS, CO, WHEN THE CREW RECEIVED A HYDRAULIC HIGH TEMPERATURE INDICATION. THE CREW DIVERTED TO LINCOLN, NE. MAINTENANCE CHECKED THE NR 3 HYDRAULIC SYSTEM QUANTITY, AND TEMPERATURE, WHICH WAS NORMAL. THE FILTER AND COMPONENTS HAD NO LEAKS NOR HAD THE BYPASS PIN POPPED. THE AIRCRAFT WAS APPROVED FOR A FERRY FLIGHT TO MINNEAPOLIS, MN. COMPANY MECHANICS REPLACED THE NR 3 RESERVOIR, SUSPECTING THAT THE BOOT STRAP CYLINDER INSIDE THE NR 3 RESERVOIR WAS LEAKING FLUID BACK INTO THE MAIN RESERVOIR, CAUSING THE HIGH TEMPERATURE INDICATION. THE AIRCRAFT WAS RETURNED TO SERVICE.