What was found
DURING DESCENT THROUGH 18,000 FT A SLIGHT ODOR RESEMBLING THAT OF GUNPOWDER SMELLED IN COCKPIT. NOTABLE RISE & TEMP ALSO FELT, & A CHANGE IN NOISE COMING FROM THE PRESSURIZATION. TEMP STARTED TO RISE ON ECS PAGE. APU WAS BROUGHT ONLINE & BLEEDS WERE SWITCHED TEMPS. CONTINUE CLIMB ON BOTH PACKS EXCEEDED 60°C TEMP CONTROL SWITCH TO MANUAL & TEMPS REMAIN HIGH UNTIL LANDING. NO CAS MESSAGES. R & R ACM. PERFORMED OPS TEST PF A/C SYS. OPS CHECK OK. LEAK CHECKED OK. NO DISCREPANCIES NOTED. ALL WORK PERFORMED IAW AMM 21-25-13. R & R NEW SEAL. NO DISCREPANCIES NOTED. ALL WORK PERFORMED IAW AMM 21-52-13 & 21-52-33. R & R LOWER OZONE CONVERTER. R & OZONE CONVERTER. R & R E-SEAL. LEAK CHECKED OK. NO DISCREPANCIES NOTED. ALL WORK PERFORMED IAW AMM 21-51-01.