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h. Idle speed check | Up
TM-1-1520-238-MTF Maintenance Test Flight Manual Helicopter Attack
AH-64A Apache | Next
2. Engine chop circuit |
TM 1-1520-238-MTF
Change 3
2-58.2
PROCEDURE
TROUBLESHOOTING
REFERENCE
STARTING ENGINES – PILOT (CONT)
k. Caution/warning lights – Check.
*l. Record engine idle speed.
10. ENG INLET anti-ice switch – As
required.
NOTE
The second engine may be started with the
RTR BK switch at LOCK or OFF as desired
or required.
11. RTR BK switch – OFF (if required).
*12. Second engine start (as required) –
Repeat step 9 above.
*13. Record ENG OIL PSI and TGT.
14. Idle speed torque check – Note that
torque is between 5 – 7% on both
engines for input clutch engagement.
15. PWR levers – Advance to FLY.
*16. Np governing check – Verify Np and Nr
at 100%.
17. Torque matching check – With both
engines at FLY, torque matching should
be within 5%.
A4, G
A4, G
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