What was found
RTO AT 90. RE ENG EEC AND R ENG LIMITER. PERFORMED ENG 2 BPCGU BITE TEST PER AMM 75-32-01-742-002-R00, NO FAULTS FOUND. PERFORMED TPU BITE TEST IAW AMM 75-32-00-702-003-R03, NO FAULTS FOUND. PERFORMED MCDP TEST 66 PLA DEG /L/R, WITHIN LIMITS IAW AMM 22-00-02-742-011. PER FIM TASK 73-21 FAULT TREE 820 M10157 DGCU- A, FAIL DIODE CONTINUITY CHECK. NEED REPLACEMEN OF M10157. TECH SUPPORT UPDATE, REMOVED AND REPLACED DGCU M10157 IAW AMM REF 73-21-10/401. NEED TO PERFORM TEST 2 PER POWER PLANT TEST REF TABLE 71-00-00-700-804-R03 AND BVCU BITE CHECK. PERFORMED BVCU BITE TEST ON ENGINE 2 PER AMM 75-32-01-742-002-R00, NO FAULTS NOTED. BITE TEST OK. PERFORMED TLA TRANSDUCER ADJ TEST IAW AMM 73-21-09-825-095-R00, TESTED OK. DUE TO NATURE OF GRIPE REQUEST POWER PLANT TEST NO. 5 REF AMM 71-00-00-715-089. PERFORMED RT ENGINE POWER PLANT PERFORMACE TEST NR 5 AT 1.7 EPR FOR 5 MIN. ENGINE PARAMETERS WERE WITHIN LIMITS. NO ENGINE EEC OR ENG LIMITER EICAS MESSAGES DISPLAYED. OK TO CONTINUE.