What was found
FLIGHT: 3979 PNS/PNS AFTER TAKEOFF LANDING GEAR DID NOT RETRACT. REPLACED HYDRAULIC POWER PACK, OPERATIONAL CHECK SATISFACTORY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT: 3979 PNS/PNS AFTER TAKEOFF LANDING GEAR DID NOT RETRACT. REPLACED HYDRAULIC POWER PACK, OPERATIONAL CHECK SATISFACTORY.