TM 10-3930-659-20 Table 3-1.  Preventive Maintenance Checks and Services (PMCS) (Con't). Not Fully Item Item to Mission No. Interval Check/ Service Procedure Capable If: 19 Annually On-board Check on-board crane cable for On-board crane cable Crane kinks, broken strands, corrosion, and has kinks, broken Cable other damage.  Replace cable as re- strands, rust, or quired (see paragraph 15-1). other damage. 20 1000 Hours Cylinder Check and adjust cylinder head Head Valve valve clearance (see paragraph 5-1). Clearance 3-10