Product Improvement Test, Additional Roof Access Step for UH-1D/H.
ARMY AVIATION TEST BOARD FORT RUCKER ALA
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Breaking of the hinges on the right crew door of the UH-1DH has been a problem, and is believed to result from the location of the access steps. Since the first step is too high to be reached from the ground, personnel open the right crew door and use the cockpit floor as the first step and the door as a crutch. Personnel ascend and descend while the door remains open. Downwash from other aircraft and use of the door as a means for assistance can cause the door to flap and the hinge to break. To correct this problem, the manufacturer has submitted an Engineering Change Proposal for incorporation of an additional step below the existing steps. The USAAVNTBD received the step for test on 12 January 1968. The access step is constructed of one-inch tubing 0.032 wall 4130 alloy steel Mil Spec 7-6736 Type 1 Cond N coated on the top side with non-skid material MIL-W-5044. The tube is a half-oval shape, providing a step about 7 inches wide extending 3 12 inches from the side of the helicopter. Plates for attachment of the step are welded on each end of the tube. The step weighs 1 pound and 10 ounces.
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