What was found
AFTER START ENG 2 FIRE LOOP A FAULT PRESENTED. PROCEDURE WITH MANTO DIDN´T WORK. FDU 2 SHOWS ON LAST LEG & GND REPORT 261215 ENG 2 FIRE LOOP A & FDU2 IWD2 FAULT NOT PRESENT ON ENG SHUTDOWN. DUE TO PREVIOUS HISTORY ENG 2 FIRE LOOP A DEFERRED INOPERATIVE UNDER MEL 26-12-01. ACFT RESTRICTED FOR EN OPERATIONS BEYOND 120 MIN IAW TSM 26-12-00-810-939A ITEM 4A 2. THE RESISTANCE BETWEEN PIN J & K IS INTO LIMITS 1500R. THE RESISTANCE VLV WAS CORRECT, THE ITEM 2 B WAS ACCOMPLISHED & THE INSOLATION RESISTANCE BETWEEN PIN A & THE METAL CASING OF 6WD2, 4022WD, 4002WD, 4012WD, 4032WD WAS =550MR. NO FAULT WAS FOUND OR DAMAGED. DURING VISUAL INSPECTION OF THE FIRE PYLON LOOP A 6WD2 & ADJACENT HARNESS THE CONNECTOR 3832VC2 WAS FOUND LOOSE & IT WAS ADJUSTED. OPERATIONAL TEST OF THE ENG FIRE & OVERHEAT DETECTION WAS PERFORMED IAW AMM 26-12-00-710-812A.