INSPECT AND REPAIR PITCH-VARYING SHAFT BORE
Technical Inspection Tool Kit, NSN 5180-00-323-5114
Machinist Scriber, 0.020 Inch Diameter Point
Fluorescent Penetrant Method
Crocus Cloth (E122)
Abrasive Pads (E2)
Aircraft Powertrain Repairer
Off Helicopter Task
Do not touch parts with bare hands.
Wear gloves (E186). Fingerprints can
Inspect bore liner (1) of pitch-varying shaft (2)
Check for rust or corrosion. There shall be
no rust or corrosion.
Check for stains. Stains shall be removable
using solvent or light polishing.
Check for pits with a scriber. Pits shall not be
felt as the scriber slides over them. Reject a
shaft with pits deeper than 0.012 inch.
Repair pits up to 0.012 inch deep as follows:
Blend out pit into surrounding area with
crocus cloth (E122). Remove minimum
material from liner (1). Do not leave any
Polish reworked area. Use abrasive pads