What was found
NR 1 ENGINE FIRE LOOP B, FAULTED, COMBINED WITH OIL ODOR THROUGHOUT THE ACFT. EMERGENCY DECLARED LANDED WITHOUT INCIDENT. AIRCRAFT WAS GROUNDED. IAW TSM 26-12-00-810-936-A22, ACCOMPLISHED WIRE CHECKS FROM FDU 1 TO THE NR 1 ENG, MANIPULATED WIRING AT ALL LOCATIONS ON THE NR 1 ENGINE, AND AT TB 3801VT1. FOUND A CHAFED WIRE 1Z001R20, THREE INCHES FROM DETECTOR 4012WD. RAN REPLACEMENT WIRE PAIR FROM 3806VC-1 A TO DETECTOR 4012WD IAW AMM 70-71-40-300-801-A AND EA 280694. ACCOMPLISHED A SATISFACTORY OPS TEST AND BITE IAW AMM 26-12-00. REPLACED APU PER J/C 33L31549001. ACCOMPLISHED INITIAL T/S FOR SMOKE ODOR PER J/C 33L00021001. FOUND APU ISOLATORS BAD, REPLACED / PER AMM 49-12-42.