What was found
L ENG BLEED PRESSURE LOST THEN FLUCUATED ABNORMALY WITH THRUST C HANGES R&R L ENG BLEED AIR OVERTEMP SENSOR, REF AMM 36-11-05 PARTS USED: 29-3611-9-9001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1392663 SN OFF 6451 SENSOR, BLEED A OFF 29-3611-9-9001 6451 ON 29-3611-9-9001 6820 R&R ENG BLEED AIR REGULATOR REF AMM 36-11-03 PARTS USED: 29-3611-9-0005,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1392518 SN OFF 0876 REGULATOR, BLEE OFF 29-3611-9-0005 0876 ON 29-3611-9-0005 5494 R&R L ENG HI STAGE RWGULATOR REF AMM 36-11-07 PARTS USED: 29-3611-9-0006,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1334877 SN OFF 5849 REGULATOR, HI S OFF 29-3611-9-0006 5849 ON 29-3611-9-0006 4775 R&R L ENG HIGH STAGE VALVE REF AMM 36-11-06 PARTS USED: 29-3611-9-0002,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1335230 SN OFF 1444 VALVE, HIGH STA OFF 29-3611-9-0002 1444 ON 29-3611-9-0002 4920 COMPLETED A BLEED AIR HEALTH CHECK REFERENCE: 36-11-00/501. SYS TEM PASSED TESTING - AFTER REVIEW OF CREW WRITEUP BEFORE RUNNING TO CONFIRM ELECTED TO REPLACE THE OVERTEMP SENSOR 450 AND BAR C OMPLETED ENGINE RUN AND VERIFIED PRESSURE SPLIT AT IDLE LEFT ENG INE WELL BELOW NORMAL LIMITS. BUMPED ENGINE UP TO CHANGE OVER S ETTING AND BLEEDS MATCHED UP. SHUT THE ENGINE BACK DOWN REPLACE D THE HS VALVE AND HS REGULATOR RAN ENG AGAIN THIS TIME AT IDLE BLEEDS MATCHED UP AND WAS WITHIN THE AMM PARAMETERS - THIS ITEM CLOSED.