Utility hyd failure in a S61.
The MGB cooler fan drive belt(of which there are two) - snapped and severed a utility hyd pipe running alongside. The hyd supplied the undercarriage.
Had 3 MAJOR problems:
1. Back of the cab filled up with hyd mist expelling @ 3000psi!! As you know, hyd mist is a carcinogenic, so all the back seat crew had to come up front as we vented the rear of the cab.
2. No U/C. So RTB and hovered for 15 mins while we blew the gear down and dropped a crewman out the back to pin the gravity fed U/C before landing.
3. No MGB cooling. Flew the last few minutes of the sortie with the gauge just shy of max (115 degrees from memory). Caption lit during our hover.