Quick view Add to Cart Reinforcement and Repair of the Horizontal Stabilizer Rib Structure - Rework and Repair to be Accomplished only at the of Horizontal Rib Failures Document Part Number: Service Bulletin No. 5 Number of pages: 8Part Number: Service Bulletin No. 5Revision Date: 20-Nov-1944Description: for C-47 & C-47A MSRP: Was: Now: $15.00