What was found
(CAN)LOW PRESS LIGHT FLICKERED DURING GEAR RETRACT & THEN CAME ON STEADY. HYD PRESS TO ZERO & NLG UNSAFE LIGHT ON. ALTHOUGH NLG INDICATED DOWN & LOCKED. TOTAL HYD FAILURE . MLG WAS RETRACTED. CRACKED HYD LINE IN THE RH WING ROOT FOUND. FOLLOWING REPLACEMENT OF LINE, AIR WAS IN HYD SYSTEM & THE ACCUM CONTAINED NIL AIR PRESSURE & HYD FLUID HAD MIGRATED PAST THE PISTON. FAILURE MAY HAVE BEEN CAUSED BY FLAT ACCUM. POWERFUL & RAPID OSCILLATION OF HYD PRESS IS CAUSED BY THE ACTION OF PUMPS ALLOWING A "BORDEN TUBE EFFECT" & HYD TUBES ARE STRESSED AT ANY BENDS. NO PRESSGAUGE ON ACCUMULATOR,