AN EMS ROTARY WINGED FLT GETS IN TROUBLE WHEN THE PLT GETS VERTIGO; IMC IN VFR FLT.

Narrative

WAS ENRTE FROM WWW HOSPITAL TO XYZ WITH TRAUMA PATIENT ONBOARD WHEN FLC ENCOUNTERED MVFR WITH DETERIORATING CEILING AND VISIBILITY BELOW FORECASTED WX. CO-PLT ELECTED TO EXECUTE A SLIGHTLY DSNDING L 180 DEG TURN (MANUALLY) TO MAINTAIN VFR. 1/2 WAY THROUGH COURSE REVERSAL AT APPROX 1000 FT AGL; ACFT ENTERED CLOUDS AND PLT BECAME SPATIALLY DISORIENTED; DEVELOPING SEVERE VERTIGO. IMMEDIATE TRANSITION WAS MADE TO SCANNING OF ATTITUDE GYRO AND OTHER FLC INSTS; BUT ACFT WAS IN A DECELERATING 10-15 DEG NOSE-UP ATTITUDE AND STEEP 30-45 DEG R ANGLE OF BANK. PLT ANNOUNCED TO CREW THAT HE HAD VERTIGO AND WRESTLED ACFT BACK INTO STABLE FLT PARAMETERS WITHIN APPROX 20-30 SECONDS; CLBING AND ACHIEVING VFR ON TOP CONDITIONS AT 3500 FT MSL. PLT RE-ENGAGED AUTOPLT AND CONTACTED ZZZ TWR 20 NM TO NW; WHICH ANNOUNCED RADAR CONTACT. PLT DECLARED EMER AND REQUESTED VECTORS FOR ILS. TWR OFFERED VECTORS BUT STATED WX AT ZZZ WAS 1400 FT OVCST AND PLT ELECTED TO CONTINUE WITH PLAN TO SHOOT ILS INTO ZZZ. VECTORS AND APCH WERE UNEVENTFUL. UPON BREAKING OUT ON FINAL AT APPROX 1400 FT AND REGAINING VMC; PLT CANCELED IFR AND CONTINUED TO XYZ AT 1000 FT AGL IN VFR.