What was found
FL380 LEFT ENGINE HAD SURGE EVERY 15-20 SECONDS AND SURGE AT 150 0 AGL UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE INSPECT #1 ENGINE PER PHONE CONVERSATION AND E MAILED REFERENCE DATA. REF L/P 6167603 + 6172788 + 6176840 + 6168367 FOR ADDITIONAL WORK & TROUBLE SHOOTING PERFORMED. REF FIM 71-06 TREE (FLAP NOTE 2) BVCU FAULTING "PLA O/C EXCITATION / OUTPUT" TRANSDUCER, THR OFF 19-7532-9-0008 1380 ON 19-7532-9-0008 2613 TRANSDUCER, THR OFF 19-7532-9-0008 1380 ON 0000 REF FIM 71-06. REPLACED THROTTLE ANGLE TRANSDUCER ON #1 ENG REF AMM 75-32-14. OPS CK NORMAL PARTS USED: 19-7532-9-0008,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1593615 SN OFF 1380. INSPECTION IS REQUIRED PER AMM TASK 71-00-00-206-007-R00. ACP BORO INSPECTION DUE TO POWER PLANT SURGE PER AMM TASK 71-00-00-206-007-R00. NO LIMITING DEFECTS NOTED. VERIFIED BORO PLUGS REMOVED ARE SECURED. REINSTALLED ALL BORO PULGS AFTER INSPECTION REF AMM TASK 71-00-00-206-007-R00. REF LOG PAGE # 6166731. #1 ENG NEEDS MCD CHECKED ACP SAFETY AND SECURITY OF 3 EACH MCD AND VERIFIED NEW O RINGS INSPECTED #1 ENG MCD REF AMM 79-21-03 FOUND NO METAL, REPLACED O-RINGS AND REINSTALLED MCD AND SAFETY. REF LOG PAGE # 6166731. #1 ENG NEEDS MCD CHECKED ACP SAFETY AND SECURITY OF 3 EACH MCD AND VERIFIED NEW O RINGS INSPECTED #1 ENG MCD REF AMM 79-21-03 FOUND NO METAL, REPLACED O-RINGS AND REINSTALLED MCD AND SAFETY. PERFORM IP/HP COMPRESSOR AIRFLOW TEST PER AMM 71-00-00-715-049-R03 ON #1 ENGINE. PREFORMED TEST NO. 3 - IP/HP COMPR