WLM,
Working from the approved manufacturers maintenance manual chapter 05-62-00,6-3 which is actually part of the Functional Check Flight but performed on the ground.
WARNING Please note that the current IETP is Rev 19.01 dtd 2012.03.05. The quoted information here is from Rev 18.
This procedure is done in sequence so read the previous part of the manual before proceeding.
It appears to be very different from a T1 and some of it is not as clear as it could be. There is actually a training course conducted by ECD to cover these procedures.
F. (20) Check MIN FUEL Flow and 97 %-RPM-warning on ground:
Engine main switches ENG I and ENG II -- switch to IDLE position
Twist grip ENG 1 and twist grip ENG 2 -- in neutral (N) position
Collective pitch -- full down (And collective lock on)
Control switch FADEC ENG I / II -- switch to ON position (it should read CHECK ON)
Engine main switch ENG I / II of the engine ENG 1 / 2 to be checked -- switch to FLIGHT position
Engine main switch ENG I / II of the other engine ENG 1 / 2 -- switch to IDLE position
Twist grip ENG 1 / 2 of the engine ENG 1 / 2 to be checked -- turn until NRo = 102 % -- 104 % to increase fuel flow (careful here no governing protection)
NOTE Wait until the engine is in stabilized condition.
CAD indications -- check TWIST GRIP, DEGRADE (TWIST GRIP because it is no longer in the correct position, DEGRADE because the FADEC is no longer in complete control)
Switch ENGINE MODE SEL ENG I / II of the engine ENG 1 / 2 to be checked -- switch to MAN position (the one on the overhead)
CAD indication ENG MANUAL -- check
CAD indication DEGRADE -- check off
Twist grip ENG 1 / 2 of the engine ENG 1 / 2 to be checked -- decelerate instantaneously to neutral (N) position to decrease fuel flow
CAUTION SHUT DOWN ENGINE ENG 1 / 2 USING THE ENGINE MAIN SWITCH ENG I / II, IF TOT RISES ABOVE 700 C.
N1, N2, TOT -- monitor during fuel flow decrease
LOW-RPM-WARNING -- record ( 97% - this is what you are checking here)
Warning light ROT. RPM -- check
Beeping tone (800 Hz) -- check
LOW-RPM-WARNING -- check, if reset possible (You should be able to)
NOTE Wait until the engine is in stabilized condition.
N1 -- record
NOTE The engine ENG 1 / 2 must not flame out in neutral (N) position. ENG OIL PRESS / ENG FAIL indication may appear
Engine main switch ENG I / II of the engine ENG 1/ 2 to be checked -- switch to OFF position
CAUTION DO NOT SWITCH ENG MODE SEL ENG I / II BACK TO NORM POSITION, BEFORE N1 IS ZERO (WAIT 16--20 SEC. ADDITIONALLY).
Switch ENGINE MODE SEL ENG I / II -- switch to NORM position of the engine ENG 1/ 2 to be checked
NOTE If the switch ENGINE MODE SEL ENG I / II is switched to NORM position, the CAD indication DEGRADE illuminates briefly.
CAD indication DEGRADE -- check, if illuminates
Control switch FADEC ENG I / II of the engine ENG 1 / 2 to be checked -- switch to OFF position
Engine ENG 1 / 2 -- restart in accordance with FLM EC135 T2 (CPDS) / FLM EC135 T2+ (CPDS) as appropriate
When it comes to these procedures the TM and PW are a little different.
As always read
this first.