As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT WITH POWER AT OR NEAR FLIGHT IDLE OILY ODOR IN AIRCRAFT BLEEDS, WHEN POWER IS INCREASED, ODOR WENT AWAY. INSPECTED AIR SWITCHING VALVE AND NL DUMMY PROBE, NO OIL NOTED. REMOVED AND REPLACED STARTER GENERATOR GARLOCK SEAL. REMOVED AND REPLACED BOTH FLEX LINES TO OIL COOLER. (NO FIX SEE REPORT HNAA0600217 DATED 02JAN07)