As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, GEAR DID NOT RAISE NORMALLY- RED LIGHT ON 3 GREENS OFF. VISUAL CONFIRMATION 3 GEAR HANGING DOWN. RECYCLED SEVERAL TIMES DECREASED AIRSPEED AT 20 KNOTS GEAR FINALLY RETRACTED, ALL LIGHTS OUT. MAINTENANCE REMOVED AND REPLACED HYDRAULIC MODULE IAW MM.