What was found
PER BOEING TELEX M-7200-98-01560, 5-5-98, PRO AIR ELECTED TO ACCOMPLISH A ONE-TIME INSP OF THE HORIZ STAB/ELEVATOR ATTACH FITTINGS TO IDENTIFY ANY FASTENERS INSTALLED DURING MANUFACTURING THAT HAD INCORRECT GRIP LENGTH. AS A RESULT OF THIS INSP, ALL 20 FASTENERS ON SUBJECT ACFT WERE BACB30NF4-19, AND WERE NOT OF ACCEPTABLE GRIP LENGTH, IN ADDITION TO BEING OUT OF CONFIGURATION PER BOEING/PRR IPC 55-50-00-08. CORRECTIVE ACTION TAKEN TO REPLACE ALL FASTENERS WITH CORRECT P/N BACB30NF4-21 PER TELEX METER AND IPC55-50-00-08. NO LOOSE OR MISSING FASTENERS FOUND DURING ACCOMPLISHMENT OF TASK. COMP P/N 69-56027-1, P/N 69-562073.