As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DLH - CREW REPORTED, THE LANDING GEAR POWER PACK CYCLED APPROXIMATELY EVERY 45 SECONDS FOLLOWING TAKEOFF. CREW ELECTED AN AIR TURN BACK AND MADE AN UNEVENTFUL LANDING. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR POWER PACK. SYSTEM OPS CHECK GOOD.