What was found
PRE-DEPARTURE CREW CALL BACK FOR EXCESSIVE ODOR OF TOXIC FUMES WHEN BLEEDS TRANSFERRED TO APU. MAINTENANCE CONFIRMED ODOR, ONLY WHEN RT PACK OPERATED. RT PACK PRIMARY & SECONDARY HEAT EXCHANGERS IN ADDITION TO ACM R & R IAW AMM 21-51-02-004 & 21-51-03-004. OPS & LEAK CHECKED GOOD. DURING INSPECTIONS, MAINT REPORTED WIRE BROKEN ON RT PACK COMPRESSOR DISCHARGE SENSOR. WIRING REPAIRED IAW SWPM 20-30 AND 20-60 & WDM 21-52-31. INDS CHECKED GOOD. NO FAULTS. LOW LIMIT VALVE OPS/ PNEUMATIC TEST IAW AMM 21-51-11-752-000 & LEAK TEST IAW AMM 21-51-11-002-001, GOOD. NO FAULTS. CONDITIONAL INSPS FOR SMOKE OR FUMES IAW AMM 05-51-56-202-001 COMPLIED WITH. NO SMOKE, FUMES OR VAPORS NOTED OPS CHECKS GOOD.