Sikorsky Model S-51 Maintenance Manual 1946 (SA-4045-1) by Sikorsky Helicopters Sale $75.00 | / SKU 31383:R Printed Manual - $75.00 Download - $75.00 Printed Manual Download Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Model S-51 Helicopter July 1946 Publication No. SA-4045-1 Register No. 114 Contents: General Details and Service Instructions, Maintenance, Charts & Tables, Service Inspection Guide