3.2 DRIVESHAFT ADAPTERS (ALUMINUM) (ET).
3.2.1 Description (Figure 3-1. Index No. 2). This inspection is applicable to the aluminum adapters on the forward
driveshaft ends of shafts 1 through 6, both ends of shaft number 7, the forward end of aft shaft number 8, both ends of
aft shaft number 9, and the engine driveshaft adapters.
3.2.2 Defects. Defects may occur anywhere on the surface of the aluminum driveshaft adapter assemblies. Particular
attention shall be given to areas around bolts. No cracks are allowed.
3.2.3 Primary Method. Eddy Current.
Eddy Current Inspection Unit
Probe, straight, shielded surface, 100 KHz-500 KHz
Probe, right angle, shielded surface, 100 KHz-500 KHz, 901/2 inch drop
Reference Block, three-notched aluminum (0.008, 0.020, and 0.040 EDM notches)
18.104.22.168 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 components shall be removed in accordance with the applicable
22.214.171.124 Access. Access is through the cabin crown tunnel covers. See Figure 1-4 - CH-47: 8; MH-47:3.
126.96.36.199 Preparation of Part. The aluminum driveshaft adapters shall be thoroughly cleaned. Refer to Preparation of Part
188.8.131.52 NDI Equipment Settings.
a. Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-1 9e .
- 200 KHz