What was found
DUCT PRESSURE INDICATION, LT AND RT POINTERS SPLIT. THE ENGINE IS THE BLEED SOURCE. ALT - 36000 FT, N1-88 PERCENT, LT 28 PSI, RT 46 PSI. REPLACED NR1 BLEED AIR REGULATOR. NO DUCT SPLIT AND PRESSURES. OPS NORMAL IAW AMM AND FIM. OK FOR SERVICE. (K)