Hiller Helicopters H-23A,B,C 1957 Inspection Requirements (1H-23A-6) by Hiller Helicopter Manuals Sale $10.00 | / SKU 7983:R Printed Manual - $10.00 Download - $10.00 Printed Manual Download Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. Helicopter