As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GROUND CONTROLLERS REPORTED SMOKE FROM RT SIDE OF AIRPLANE. UPON APU SHUTDOWN, SMOKE WAS OBSERVED COMING FROM APU INTAKE AND EXHAUST. BOTH RED AND YELLOW APU OIL LIGHTS ILLUMINATED. APU OIL LEVEL WAS VERIFIED NORMAL PRIOR TO THIS EVENT. [07-09-07] REMOVED AND REPLACED APU IAW 560XL MM 49-10-00.