73-0137 NO.2 ENGINE - HMU OVER-FUEL THRESHOLD MARGIN INCREASE. SERVICE BULLETIN MOS 20-JUN-2007 HRS,MSC - ENC RECOMMENDED NOT APPLICABLE - BY SERIAL NUMBER S/N 874438 N/A COMPLIED WITH - IAW THE SB 7-Insufficient Information +-Task exists in Inspection Manual (s)-Suppressed Requirement (ex)-Excluded Tasks