Pratt & Whitney Aircraft TwinWasp(R-1830)S1C3G Engine Maintenance Manual (118610) by Pratt & Whitney Aircraft Engines Sale $35.00 | / SKU 7485:R Printed Manual - $35.00 Download - $35.00 Printed Manual Download Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Revised September 1977