What was found
LEFT FUEL IMBALANCE OF 1200 LB AFTER DEPARTING BUR WITH MORE THAN 1000 LB IN CENTER TANK WITH CTR; #1 & #2 FUEL PUMPS. PERFORMED TANK & COMPENSATOR UNIT RESISTANCE & CAPACITANCE CHECK IAW AMM 28-41-21-710-801. FOUND COMPENSATOR CAPACITANCE VALUE OUT OF LIMITS; 69.42 PICOFARADS AT 5000HZ & 70.83 PICOFARADS AT 500 HZ. PERFORMED FQIS BITE TEST VIA MCDU IAW FIM 28-41 TASK 801. 2 PREVIOUS INFLIGHT FAULTS ARE RECORDED OVER A HISTORY OF 4 FLIGHT LEGS FOR: 28-41002 PROCESSOR FAULT, 28-41105 HI-Z OP/SHORT TO SHIELD, TANK 1 QTY BLANK, PERFORMED RESISTANCE & CAPACITANCE CHECK OF TANK 1 COMPENSATOR & TANK UNITS PER AMM 28-41-21-710-801. COMPENSATOR & TU10 FAILED CAPACITANCE CHECK. TANK 1 COMP & TU10 REQUIRE REPLACEMENT. VERIFIED TANK #1 COMPENSATOR (F15L) & TANK UNIT 10 (F10L) REPLACED WITH SERVICEABLE UNITS IAW W/O# 2311M476. PERFORMED CAPACITANCE CHECK OF TANK #1 COMPENSATOR & TANK UNIT 10 IAW AMM 28-41-21-710-801. COMPENSATOR HAS CAPACITANCE VALUE OF 57.54 PF & TANK UNIT 10 HAS CAPACITANCE VALUE OF 27.59 PF. ORIGINAL SUBMISSION DATE: 5/30/2023