What was found
SMOKE APPEARED IN THE CABIN AFTER TAKEOFF AND BEGAN CLEARING WITHIN 2-3 MINUTES. THE SMOKE HAD COMPLETELY DISSIPATED WITHIN 10-15 MINUTES. THE AIRCRAFT CONTINUED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND A HYDRAULIC LINE IN THE AFT CARGO COMPARTMENT LEAKING CAUSING HYDRAULIC FLUID TO BE INGESTED BY APU. THE LINE WAS REPAIRED IAW GENERAL MAINTENANCE MANUAL 10-799-78. AN ENGINE RUN WAS PERFORMED WITH PACKS OPERATING AND NO SMOKE WAS NOTED.