What was found
ENGINE NR 2 IGNITER SYSTEM B FAULT NO ENGINE LIGHT UP ONLY SYSTEM A GROUNDED - YES. SWAPPED EIU 1&2, NO HELP FAULT REMAINS. SWAPPED CONNECTORS AT IGNITION EXCITERS FROM A TO B AND FAULT FOLLOWED RETURNED TO ORIGINAL POSITION . FURTHER T/S REQUIRED. PER TSM 74-21-00-810-805-A REMOVED AND REPLACED NR 2 ENGINE CHANNEL B IGNITION HARNESS HJ2B (4178KS) REF 71-51-43. ENGINE START SUCCESSFUL ON CHANNEL B AND A MULTIPLE TIMES. INSTALLED IGNITION CHANNEL B HARNESS FIN 4178KS P/N # 515167-3 SN S17450333 ON ENGINE S/N 598226 PER AMM 71-51-43. OPS CHECK GOOD OK FOR SERVICE.