
DE HAVILLAND DHC8 202–ATA 3610 PNEUMATIC DISTRIBUTION SYSTEM–Muscle Pressure Line–FRACTURED. DR 611851653 Number 1 engine experienced power loss of 20 to 25% Tq with climb power set @1050 Np. NH parameter however matched. Open cowl inspection carried out, #1 bleed valve muscle line found fractured. Line replaced. OEM notified.