Nick and Heli Tester,
Thank you for your responses! It is clearing up a little now (excellent description of why the 3 criteria are used).
I thought I'd add that of course don't mean to criticize the RFM... just needed some clarification!
This thread is such a powerful tool. I hope it continues!
Having said that... I do have more questions
:
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1.) Are you familiar with Customer Service Notice No. 76-88A?
(it outlines the how to manage/analyze power assurance and trend data)
Nick and Heli Tester said:
(
Original RAM) - (Todays RAM)
< 30 min margin
is the formula to get that 3rd criteria
The CSN says you compare
(
Base Line) - (Todays RAM)
< 30 min margin
"Base Line" = the 5th check after the 30min power check...
so,
2.) To what should I compare (Todays RAM)? Base Line or Original RAM?
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Nick said:
"Note that in the maintenance manual, after maintenance, you re-do the 30 min check, and start a new rolling average."
3.) If you do a 30 min power check at the 50hr interval (no maintenance done necessarily), do you restart the RAM?
(we only restart the RAM if a component on the engine has been changed ie. Fuel Control, N2 governor, compressor etc)
because..
With how much we are flying, on the 20th day (probably close to 50hrs later) it's usually time to do a another 30 min check... if we restarted the RAM every time the 30 min was done, we'd barely get the "original RAM" before it is time to start another "original RAM"!
4.)Is this the reason for that "base line" possibly in the CSN?