Pardon me.....but the critical fuel level is not the Main Tank but rather is the Supply Tank level.
There are any number of things that can happen to fuel transfer from the Main Tank to the Supply Tanks....but the crucial thing is the amount of fuel actually in the Supply Tanks.
At some point the Supply Tanks will start showing a decrease in quantity as the Transfer of fuel ceases for whatever reason.
Shortly after that happens.....some caution lights illuminate, then some warning lights illuminate, and at various times Warning Horns start sounding.
Add in the Operational Procedure re Minimum Landing Allowance Fuel as reported by Sid.....and one must question the Pilot's Actions.
If the Low Fuel Warnings were occurring prematurely....and there was fuel left in the Main Tank....but the Supply Tanks were showing a decreasing Quantity.....the Landing Criteria was met.....no matter the reason....it was met.
If confronted with multiple indications of decreasing fuel levels in the Supply Tanks..... which confirms a fuel quantity below the MLA Fuel Level for Night Flight.....the correct course of action would have been to carry out a Precautionary Landing.
The Pilot did not land.
Plainly he decided to make for the heliport and did not make it.
How many of us have never done a similar thing?