What was found
LH HORIZONTAL STABILIZER TIP CLOSING RIB #9 P/N 600-23037-22 HAS TWO ELONGATED FASTENER HOLES CAUSED BY CORROSION. HORIZONTAL REAR SPAR AND LBL112.0. ***AIRCRAFT REMOVED FROM SERVICE*** REMOVED DAMAGED SECTIONS OF CLOSING RIB AT TWO LOCATIONS. MEASUREMENTS P1= L=.700Ï¿½ X W= 0.400Ï¿½ AND P2= L=0.350Ï¿½ X W= 0.300Ï¿½. FABRICATED A REPAIR STRAP, REPAIR ANGLE AND FILLERS. PERFORMED HFEC TO CUTOUT EDGES WITH NO INDICATIONS. RESTORED PROTECTIVE FINISH. ALL WORK WITHIN LIMITS WAS PERFORMED IAW ASAP EA #AWAC-CRJ255-01789 REV IR DATED 1/15/2022. WORK PERFORMED UNDER AERSALE WORK ORDER 003500, CARD NO. 20510, TT: 39682:59 TC: 38340.