TM 55-1520-240-23-5 6-10.1 CLEAN AND INSPECT DRIVE SHAFTING OFF AIRCRAFT     (Continued) 6-10.1 DRIVE SHAFT CLEANING, ALTERNATE METHOD 7. Clean drive shafts (12) as follows: NOTE Drive shaft must be thoroughly clean before corrosion inspection can be accomplished. a. Submerge spline adapter end (13) of drive shaft (12) into a bucket containing 9 inches of a  10 percent  solution of cleaning compound (E117.1) and water. Wear gloves (E184.1). b. Repeat steps 6b thru 6f. c. Drain and rinse shaft with water.  Final rinse with alcohol (E64).  Wear gloves (E184.1). Allow shaft (12) to air dry. d. If dirt/grease was not adequately removed from drive shaft (12), re-clean drive shaft (step 7). e. If dirt/grease was adequately removed from drive shaft (12), inspect drive shaft for corrosion (step 8). 8. Inspect drive shaft for corrosion as follows: a. Insert light source at both ends of drive shaft (12). b. Insert inspection mirror in spline adapter end (13). c. Inspect internal surfaces of spline adapter end (13) and drive shaft (12). d. Inspect inside diameter of drive shaft adapters riveted area (15). e. Inspect end of aluminum shaft edge (16), next to the internal shoulder (17) of the steel adapter (18). f. Replace drive shaft (12) if any corrosion or exfoliation is found. 9. Inspect splines for corrosion: a. Corrosion/pitting shall not exceed  0.02 inch in depth and/or cover more than  25 percent of total area of spline (13). FOLLOW-ON MAINTENANCE: Install No.  1 drive shaft (Task 6-17). Install No.  2 thru No.  6 drive shaft (Task 6-18). Install aft drive shafting (Task 6-29). Assemble drive shaft (Task 6-16). END OF TASK 6-36.2 Change 1