"STL HOLDER W/CARBIDE CUTTERS;USEDW/PWA72489(4920014811154);RQRD FOR WELD REPAIR OF AIR SEAL KNIFE EDGES ON NO. 3 BEARING AIR SEAL,4080811(2840013816850);PROVIDES RQRD TOOL CLEARANCE TO REACH BETWEEN KNIFE-EDGED SEALS,W/MATCHED SET CARBIDE CUTTERS TO PRODUCE PROFILE RQRD OF 3 KNIFE-EDGED SEAL TIPS;REF-CIP REPAIR TASK 311-20Y;SERD 9209, END ITEM F100-PW-229 AND F100-PW100/200/220/2203 ENGINES"