AGUSTA A109E - Page 264

Figure 4-2. Power assurance check - in flight.
POWER
ASSURANCE
CHECK
IN FLIGHT
* HEATER / E.C.S. OFF.
* ESTABILISH LEVEL FLIGHT ABOVE 1000 ft. AGL.
* TEST ENGINE - SET ENG. GOV. SWITCH TO MANUAL
* GENERATOR LOAD TO MINIMUM (< 28 A).
* AIRSPEED - 100 KIAS.
* OTHER ENGINE - LEAVE ENG. GOV. SWITCH TO AUTO
* SET NR TO 100%.
* OPERATE TEST ENG TRIM TO INCREASE POWER UNTIL ENGINE TORQUE IS WITHIN TEST RANGE. DO NOT EXCEED 820˚C TOT OR 97.4% N1 OR 100% TORQUE.
* STABILIZE POWER ONE MINUTE IN LEVEL FLIGHT THEN RECORD OAT, PRESSURE ALTITUDE, ENGINE TORQUE, TOT AND N1.
* ENTER CHART AT INDICATED ENGINE TORQUE, MOVE DOWN TO INTERSECT PRESSURE ALTITUDE, PROCEED TO THE RIGHT TO INTERSECT OUTSIDE AIR TEMPERATURE,
THEN MOVE UP TO READ VALUES FOR MAXIMUM ALLOWABLE TOT AND GAS PRODUCER RPM (N1).
* IF INDICATED TOT OR GAS PRODUCER RPM (N1) EXCEEDS MAX ALLOWABLE, REPEAT CHECK, STABILIZING POWER FOUR MINUTES.
* REPEAT CHECK USING OTHER ENGINE.
* IF EITHER ENGINE EXCEEDS ALLOWABLE TOT OR GAS PRODUCER RPM (N1) AFTER STABILIZING FOUR MINUTES, CARRY OUT A POWER ASSURANCE CHECK IN HOVER.
PRESSURE
ALTITUDE
- FEET
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0 (S.L.)
-1000
60
70
80
90
100
ENGINE TORQUE - PERCENT (INDICATED)
RPT 109-60-99/II
-20
OAT - ˚C
-30
50
40
30
20
10
0
-10
80
85
90
95
100
MAXIMUM ALLOWABLE GAS PRODUCER RPM (N1) - PERCENT
ABHD076B
OAT - ˚C
-30
50
40
30
20
10
0
-10
-20
550
600
650
700
750
800
850
MAXIMUM ALLOWABLE TOT - ˚C
4-4 R.A.I. Approved
Rev. 2
RFM A109E
UNMAINTAINED COPY