Section 24 Deburred F-1254-L&R Support Frames. Pg. 23-04 Step 1: Separated and deburred the F-1203H-L&R Arm Rest Brackets. Step 2: Riveted the the Arm Rest Brackets to the Bulkhead Side Channels for both sides. Step 4: Removed the tab from the notch in the Arm Rests.