Quick view Add to Cart Modification and Installation of Oil Screen and Check Valve Assembly on Pratt & Whitney R-985, R-1340, R-1535, R-1830, Document Part Number: T.O. No. 02-10-27 Number of pages: 2Part Number: T.O. No. 02-10-27Revision Date: 12-Oct-1942 MSRP: Was: Now: $15.00