TB 1-1520-238-20-66
(9) Check for continuity (multimeter) from pin 66 (common) on P682, to pin 125 (S1) and then
126 (S2) on P686.
(10) If continuity is present proceed to paragraph 8.b.(11). If it is not, proceed to paragraph
8.b.(12).
(11) Rotate the SPAD Mechanical Cam from its present position, to the opposite side of the
Cam Stop (other direction). Re-check the function of the switches by performing paragraph 8.b.(9).
(12) Failure of either/both switches is cause for rejection. Contact your local MDHS
representative for disposition instructions.
CPG Lateral SPAD
(13) Visually inspect the switches for security using a flashlight and inspection mirror.
Reference paragraphs 8.b. (3) and 8.b. (4) for inspection criteria.
(14) Remove the SPAD Shear Pin I/A/W task 11.83 step d., retain the pin for later installation.
Allow the Mechanical Cam to rotate, closing the SPAD switches.
(15) Check for continuity from pin 66 (common) on P682 to pins 123 (S1) and then 124 (S2)
on P686 (aft avionics bay). If continuity is present rotate the Mechanical Cam in the other direction (opposite).
Re-check continuity (Pin 66 to 123 and then to 124).
(16) If continuity is not present refer to paragraph 8.b.(12) for corrective action.
CPG Longitudinal SPAD
(17) Visually inspect the switches for security using a flashlight and inspection mirror.
Reference paragraphs 8.b.(3) and 8.b.(4) for inspection criteria.
(18) Remove the SPAD Shear Pin I/A/W task 11.56, step a., retain the pin for later installation.
Allow the Mechanical Cam to rotate, closing the SPAD switches.
(19) Check for continuity from pin 66 (common) on P682 to pins 115 (S1) and then 1 22 (S2)
on P686 (aft avionics bay). If continuity is present rotate the Mechanical Cam in the other direction (opposite).
Re-check continuity (Pin 66 to 115 and then to 122).
CPG Collective SPAD
CAUTION
Ensure that the Collective LVDT connector (J234/P234) is re-connected after
removing the Collective Cover prior to "power-on testing."
(20) Gain access to the CPG's Collective SPAD Assembly by removing the CPG Collective
Stick Cover, task 11.44.
(21) If continuity is not present refer to paragraph 8.b. (12) for corrective action.
(22) Visually inspect switches (S1 & S2) for security using a flashlight and inspection mirror.
Reference paragraphs 8.b. (3) and 8.b. (4) for inspection criteria.
(23) Remove the SPAD Shear Pin I/A/W task 11.43 step b., retain the pin for later installation.
Allow the Mechanical Cam to rotate, closing the SPAD switches.
(24) Check for continuity from pin 66 (common) on P682 to pins 127 (S1) and then 128 (S2)
on P686. If continuity is present rotate the Mechanical Cam in the other direction (opposite). Recheck
continuity (Pin 66 to 127 and then to 128).
(25) If continuity is not present refer to paragraph 8.c. (10) for corrective action.
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