What was found
DURING CRUISE FLIGHT THERE WAS A FOUL ODOR IN THE AIR DUCTING, FOLLOWED BY THE LAV SMOKE DETECTOR WARNING HORN. THERE WAS NO EVIDENCE BY ANY CREW MEMBER OF ACTUAL SMOKE. IAW CREW VERBAL, TURNED NR 1 BLEED OFF AND ODOR SEEMED TO CLEAR. C/W FIM TASK 71-00-00-810-817, PAR 1-5G (INSPECTED AIR INTAKE AND P2.2 AND 2.7 DUCTS ON BOTH ENGINES) NO DEFECTS NOTED. BOROSCOPE OF GAS GENERATOR CASE AND LP AND HP COMPRESSORS TO BE COMPLIED WITH. FERRIED. C/W BORESCOPE, FOUND NO SIGN OF STANDING OIL OR DEFECTS OF COMPRESSOR INNER SUPPORT OF NR1 ENGINE IAW 71-00-00-810-817. R & R NR1 ENG IAW TASK CARDS 6710003 AND 6710004. NO OIL ODOR NOTED, ENG OPS CHECKS NORMAL. NO LEAKS NOTED. RETURNED TO SERVICE.