What was found
FLT#44, LGW-JFK. (ETOPS) 'ENGINE 2 FIRE LOOP B FAULT. ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ). REF TSM 26-12-00-810-806A, AWM 26-12-08 AND AWM 71-575, CHK WIRING FDU2 PINS K&J RESISTANCE 1476 OHMS, PERFORMED A GVI OF THE FIRE LOOPB ELEMENTS NO DAMAGES NOTED. REMOVED AND REPLACED FDU 2 AS A PRECAUTIONARY T/SHOOTING, REF LOG PAGE 3715588-2, FOR CORRECTIVE ACTION. CLEARED MDDR 517296. MX-4 UPDATED AND PLACARD REMOVED.