As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE DUCT LEAK LIGHT ILLUMINATED SHORTLY AFTER TAKEOFF. COMPLIED WITH QRH AND RETURNED TO PSP AND CONTACTED MAINTENANCE. FOUND O-RINGS WORN ON COUPLER SLEEVE CAUSING LEFT ENGINE BLEED AIR DUCT TUBE ASSEMBLY TO LEAK AT LEADING EDGE AND AT WING TO FUSELAGE. REMOVED AND REPLACED O-RING.