DC-9-10 Series Aircraft-

    The DHC supplied hardware for the DC-9-10 series aircraft installed under DHC STC SA1563GL include the Pratt & Whitney 12-lobe mixer kit (P&W Service Bulletins 5947 & 6146), the modification to the thrust reverser to increase the nozzle exit area (due to the incorporation of the mixer), new CSD tubing for the right hand (number 2) engine, and a forty-degree frangible flap stop.

 

    In addition to the hardware supplied as part of the Hushkit, DHC requires as a prerequisite to the installation of the Hushkit that the following are accomplished:

	Incorporation of acoustic liner material in the fan bypass duct (P&W S/B 4127),
	Replacement of the No. 4 ½ and 6 oil tube assembly (P&W S/B 5465),
	Installation/modification of the stage 1 fan blade with a double chamfer cut (P&W S/B 5897),
	Acoustically treated nose cowls and thrust reversers (DAC S/B 71-21), and the ability to operate the aircraft at 40° flaps (Airborne Express STC SA4006NM).