As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM DTW ON FLIGHT 2800, STAB DEICE LIGHT WOULD NOT ILLUMINATE. TRIED MANUAL INFLATION AND LIGHT FLICKERED BUT DID NOT ILLUMINATE STEADY. TRIED AGAIN ON MANUAL AND AUTO AND ONLY GOT FLICKER. AIR TURNBACK TO DTW. MAINTENANCE REPLACED EJECTOR VALVE FOR TAIL BOOT PN 3950FS2, SN/0764. ALL CHECKS GOOD AT THIS TIME IAW SF340MM.