Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance. Partial
inspection for cause (visual indications, sites of mechanical damage, corrosion, etc.) may be performed on all exposed
surfaces of the installed part using this procedure. If required, the landing gear shall be removed in accordance with the
Access. Not applicable.
Preparation of Part. The forward landing gear support structure shall be thoroughly, cleaned. Refer to
NDI Equipment Settings.
Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-19eII.
- 200 KHz
Probe drive - mid
Null probe on test block.
Adjust phase as required to obtain horizontal lift-off.
Move probe over all three notches in test block. Adjust gain to obtain a three block vertical signal
when probe is passed over 0.040 inch notch in test block. (Refer to standard instrument display
Place probe on part in the inspection location and null. Adjust phase as required to obtain horizontal lift-
Inspect the part.
Any signal similar to the notches in the test block is cause for rejection.
ease of accessibility and user friendliness. If the probes are changed, steps 220.127.116.11 b.
(1), (2), and (3) shall be repeated each time a change is made.