Jibboo,
I understand your issue. Regrettably I don’t have an S-76A RFM and I have not seen Sikorsky CSN 76-88A, so I’m working from memory.
You stated that the CSN defines "Base Line" = the 5th check after the 30-min power check. So I assume that means the baseline (against which the current 20-point RAM is compared) is the RAM of the first five 135 kt power check points following the original 30-min power check (and not the original 20-point RAM as I previously suggested). As I recall, you don’t have to establish a new baseline every 50 hours just because you do another 30-min power check. Re-baselining is only required after a maintenance action. Therefore, I would modify the equation in Nick’s last post to read:
(5-point baseline) - (Todays 20-point RAM) < most recent 30 min margin
So the 20-point RAM could be calculated continuously for say 500 hours through 10 30-min power checks as long as there is no maintenance action.
Hopefully Nick will read this and confirm. I think the only other place you can turn for guidance is the Sikorsky Aircraft Help Desk.
HT