What was found
WHILE ACCOMPLISHING T/C 78273000, FOUND FAULT 75-20581, TBV DEMAND AND POSITION SIGNAL DISAGREE. FAULT CAUSES ENG CONTROL LIGHT. NO GO FAULT NR 1 ENGINE. ACCOMPLISHED FIM 75-23, TASK 801, NO FAULTS FOUND, ALL VALUES WITHIN LIMITS DUE TO HISTORY OF TBV AND LPTACC FAULTS AND EEC REPLACED CONSULTED WITH TECH SERVICES, REQUIRES HMU REPLACEMENT. R & R NR 1 ENGINE HMU REF MM 73-21-10-000-801-F00, 73-21-10-400-801-F00. ACCOMPLISHED TESTS & REPAIR CONFIRMATION IAW MM 71-00-00, TABLE 502 & FIM 75-23-00-810-801-F00. NO FAULTS NOTED.