What was found
AIR TURN BACK DUE TO RIGHT PYLON BLEED LEAK CAS SHORTLY AFTER TAKEOFF. WITHIN 10 SECONDS, THE PF BROUGHT THE RIGHT THRUST LEVER BACK TO IDLE. THE CAS MESSAGE WENT AWAY, THE CREW DECLARED AN EMERGENCY, AND MADE RIGHT-HAND VFR TRAFFIC PER THEIR PREFLIGHT EMERGENCY BRIEFING FOR A SINGLE ENGINE LANDING AT SFB. AIRCRAFT LANDED WITHOUT INCIDENT. RAN RH ENGINE; CONFIRMED A BLEED AIR LEAK OUTBOARD OF RH BLEED AIR HIGH PRESSURE VALVE; REMOVED, RESEATED, AND RE-TORQUED BAND CLAMP IAW CHALLENGER 300 AMM 36-11-05-000-801. LEAK CHECK IS GOOD.