ME ASSEMBLY - INTRODUCTION OF A NEW PROBE HOUSING WITH INCREASED LENGTH INSERTS. SERVICE BULLETIN MOS MRS/P.1SC - ENC SB 72-0298 R2 NO.2 ENGINE -FAN FRAME ASSEMBLY (72-23-00) - INTRODUCTION OF A NEW PROBE HOUSING WITH INCREASED LENGTH INSERTS. SERVICE BULLETIN MOS HRS(MSC ENC 7-Insufficient Information +-Ta