Countersunk L & R F-857C seat belt bracket. Aft hole of L bracket now sized for AN426 AD4-4.5. Dimpled F-812, F-811, F-810 and lower F-809 bulkheads. Dimpled aft R F-824-1 skin. Countersunk all #40 holes in R F-888 aft mid longeron and F-889 aft lower longeron. Removed, deburred and dimpled lower F-808 bulkhead. Removed and deburred F-818 baggage ribs and bellcrank rib. Removed, deburred and dipled L & R F-860C rear armrests, F-860B mid armrests, and F-860A forward armrests. Removed and deburred L & R F-806A and F-805 fuselage bulkheads. Cleaned up F-805-L-1 fuselage bulkhead throttle pushrod opening. Removed and deburred L & R F-805B floor support angles and F-805G gussets. Removed L & R F-823 mid side skins and associated parts. Removed seat rib assembly from center section. Re-clecoed F-822-1 forward floor panel to forward and aft bottom flanges of center section.
