What was found
***EMERGENCY DECLARED*** CREW REST SMOKE DETECTION ALARM AFTER LANDING FLT CREW DEBRIEF IS THEY DID SEE SMOKE/FUMES FROM CREW REST AREA BUT IT WASNT PRESENT ON BLOCK IN. SUSPECT RUNWAY DEICING FLUID INJESTION UPON LANDING. PERFORMED CREW REST SMOKE DETECTION OPS TEST PER AMM 26-14-60-710-801 & TEST PASSED ON ALL 3 SMOKE DETECTORS. PERFORMED FIRE/OVHT GRND TEST & TEST PASSED PER AMM 26-14-00. RAN ALL 3 PACKS SINCE BLOCK IN AND NO VISIBLE SMOKE OBSERVED INSIDE A/C & NO ODOR. CMC REPORTS NO FAULTS WITH SMOKE DETECTION SYS.