A three feet ten inches long tinned copper angle bulkhead plate is sized at four inches by four inches by one-quarter inch. The layout features twenty-two 0.75-inch diameter holes combined with smaller 0.20-inch diameter holes configured in a standard polyphasor hole pattern. A two-hole lug is mounted on the same side as the polyphasors. Dimensions and spacing callouts govern the precise hole locations across the plate length. All drilling and purchasing configurations require confirmation with the FAA prior to execution.
2" 2" 2" 4" 4" 1 1/8" 1 1/8" 0.75" DIAMETER HOLE 0.20" DIAMETER HOLE 1 3/16" 4" X 4" X 1/4" TINNED COPPER ANGLE 2-HOLE LUG, MOUNTED ON SAME SIDE AS POLYPHASORS TYPICAL POLYPHASOR HOLE LAYOUT. CONFIRM WITH FAA PRIOR TO DRILLING OR PURCHASING. 3' - 10" ATBM ELECTRONICS ROOM BULKHEAD PLATE LAYOUT - 22-HOLE
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