Back riveted L & R F-888-1 aft mid longerons to the aft side skins. Clecoed L&R aft side skins to upper longerons and F-807 bulkhead. Riveted stab attach bars and F-811C-1 angle to F-811-1 bulkhead assembly. Final drilled 1/4" WD-409 tail spring mount holes and deburred. Bolted WD-409 tail spring mount to F-811 bulkhead assembly.
