BHT-412-MM-2
5-00-00
Page 88 Rev. 26 01 JUN 2018
Export Classification C, ECCN EAR99
e. Functionally check operation of tube as follows:
DO NOT RELEASE ELEVATOR AND ALLOW THE
SPRING TO DRIVE ELEVATOR BACK TO
ORIGINAL POSITION.
(1) Move elevator to extreme nose down position and
while holding allow elevator to slowly return to original position.
Failure to return to original position, binding and/or lock-up are
not acceptable.
(2) If any of these conditions exist, replace tube.
f. Remove elevator control tube and measure spring
breakout force for 90 to 100 pounds (400.32 to 444.80 N).
Install elevator control tube.
g. Functionally check elevator rigging for proper setting
and travel.
h. Inspect and measure elevator trailing edge tab for 16°
±1/4° angle down from upper surface of elevator.
Chapter 52 4. Baggage compartment door for corrosion, damage,
distortion, and positive locking mechanism.
Chapter 26 5. Baggage compartment smoke detector for condition and
security.
Chapter 96 6. Inspect wire bundles and clamping for chafing, condition,
and security.
Step 7 pertains to helicopters S/N 33001 through
33213 and S/N 36001 through 36019 not modified
by 412-570-001-103 or Pre BHT-412-SI-74 (412SP
to 412HP Upgrade).
Chapter 65 7. Tail rotor driveshaft:
5-10. 300 HOUR/12 MONTH INSPECTION — PART B (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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