As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON ROTATION, GEAR WAS SELECTED UP AND THE GEAR WENT UP AND NEVER MADE UPLOCK AND THEN FELL DOWN AFTER LOSS OF FLUID WHEN THE NLG DRAG STRUT FLEX LINE RUPTURED, FLUID LOSS OCURRED, LINE WAS REPLACED GEAR SWINGS CARRIED OUT AND RELEASED TO SERVICE.