Page 5.10 Chapter 5 Inspections JUL 2020
5-42 Run-Up (continued)
15.
Transmit on 118.0, 125.0, and 135.0 MHz. Verify no variation in dual
tachometer readings during transmission.
16.
Briefly operate the heater at 100% N2 to ensure system functions and is
clear of debris.
17.
Check engine anti-ice system. Green anti-ice indicator should illuminate
accompanied by small MGT increase when anti-ice is switched ON.
18.
Raise collective slightly, reduce N2 RPM slowly via twist grip. Verify low
RPM horns and light activate at 95% to 94% and continue at all lower
RPMs.
19.
Perform engine N1 DECELERATION CHECK per Section 4 of the Pilot’s
Operating Handbook. (With N2/R at 100% and N1 at 80%, N1 decel to
70% following rapid throttle closure should take at least 2 seconds.)
20.
Check hydraulic system operation. Using cyclic-mounted hydraulics switch,
turn hydraulics OFF and verify HYD light on (if equipped). Using small
longitudinal cyclic inputs, there should be approximately one-half inch of
freeplay before encountering stiffness and feedback. Turn hydraulics ON.
Controls should be free with no feedback or uncommanded motion. Pull
hydraulic circuit breaker, and verify that hydraulics remain on regardless
of cyclic hydraulic switch position. Reset system to breaker in, hydraulics
switch ON.
21.
Air conditioning (if installed): Verify system blows cold air on both low
and high settings. Verify no EMI/RFI with other instruments and systems.
After a flight with air conditioning on, verify water drains from drain tube
in ship’s belly (may be little or no water in very dry conditions).
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