TM 10-1670-296-20&P 0013 00
5. Check for Free Movement of Actuator Arm Latching Pin as follows:
Pull latch ring on side of actuator to determine if latch pin moves freely under force of latch spring.
Slowly rotate actuator arm counterclockwise to ensure arm pushes in latch pin and latch pin snaps
back into position to secure from rotating clockwise.
If latch pin sticks in one position, check for binding, bends, dirt, or debris on the latch pin assembly
inside actuator. Remove dirt and foreign matter but if pin is bent, remove EFTC from service.
6. Tighten three (3) self-locking nuts on 3-point link assembly as follows:
Using a suitable tool, tighten all three self-locking nuts whereby, two (2) threads of bolt extend past
end of nut. Do not over tighten nuts.
If length of thread does not allow for the above procedures, tighten nut whereby end of bolt is flush
with end of nut.
7. Check for a Misaligned Dot and Arrow as follows:
If dot and arrow are not aligned within a 1/16 -inch, check that lock link is fully seated into catch slot so
catch is completely bottomed over lock link.
If latch is properly seated but dot and arrow remain misaligned more than a 1/16-inch, the latch must
be identified for continued use and inspections.
Stencil a ½-inch capital letter I on each side plate using yellow enamel paint.
8. Check Cam of 3-Point Link and Latch for Proper Seating as follows:
Check alignment of dot and arrow as per instructions above.
If cam cannot be locked into a latch, repeat test procedure using other cam and latch combinations.
If cam cannot be locked, remove from service. If properly seated, ensure cable is properly
connected to latch and actuator.
9. If positive lock is felt more than 1/16-inch from the position of alignment between the visual dot and arrow
when thumb pressure is exerted on the latch. Check actuator as follows:
Disconnect cable from actuator end.
Rotate arm of actuator to locking position and insert pin to hold arm.
Check locking position of actuating link at cable hole connecting point. Measure the distance
between the center of the hole to the outside end of the actuator housing from which cable extends.
If measured distance does not exceed 2 ½-inches, the cable is adjusted incorrectly. Do not use
If the measured distance exceeds 2 ½-inches, the actuator arm/shaft is improperly fabricated and will
not provide adequate cable locking stroke. Do not use actuator.
10. Check EFTC for Positive Lock and Operation as follows: