What was found
DURING SCHEDULED 1ST (D) INSPECTION FOUND HI-LOK PIN COLLAR LOOSE (UPPER HEX SECTION STILL INTACT) FOR (1) FASTENER (OF 3) ATTACHING PN 454A23202-3 LT VERTICAL STABILIZER PIVOT PLATE TO VERTICAL STABILIZER AFT SPAR, UPPER LT SIDE. AREA IS JUST BELOW WHERE PN 45A61505-11 ELEVATOR CONTROL ATTACH BRACKET IS INSTALLED. HI-LOK PIN FOUND STILL SECURE, COLLAR TORQUED DOWN AND SNAPPED OFF NORMALLY WHEN TIGHTENED. SUSPECT COLLAR STARTED BUT NOT TORQUED DOWN AT MFG OR DURING SUBSEQUENT POSSIBLE UNDOCUMENTED REPAIRS THIS AREA. AREA SHOULD BE VISIBLE DURING NORMAL (C) CHECKS OR WHEN AFT VERTICAL STABILIZER/ HORIZONTAL STABILIZER FAIRING IS REMOVED. (K)