As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING RETURN FLIGHT FROM BAYSTATE HOSPITAL BACK TO BASE, WHILE OVER BRADLEY AIRPORT (KBDL) THE RIGHT-SIDE MAIN ROTOR TRANSMISSION PRESSURE INDICATION DROPPED TO 0. LANDING WAS PERFORMED AT KBDL MANAGEMENT, OCC, AND MAINT. WHERE THEN NOTIFIED.