What was found
ON DEPARTURE FROM DTW DURING THE INITIAL CLIMB WE EXPERIENCED GPS LOI AND GPS LOSS OF POSITION. SHORTLY THEREAFTER WE ENTERED IMC AND RECEIVED AHRS 1 AND 2 FAULT. EMERGENCY WAS DECLARED AND WE RETURNED TO DTW FOR A NORMAL LANDING. WHILE BEING VECTORED FOR THE APPROACH ALL SYSTEMS RETURNED TO NORMAL OPERATION PERFORMED GLOBAL POSITIONING SYSTEM OPS TEST. NO FAULTS FOUND. IAW AMM 34-56-00-710-801-A.