Quick view Add to Cart Inspection and Repair of Cracked Outer Wing Ribs - No. 7 to 10 Inclusive - Stations 125.3, 143.2, 161.1, and 179 Document Part Number: Service Bulletin No. 18 Number of pages: 6Part Number: Service Bulletin No. 18Revision Date: 4-June-1945Description: C-47B MSRP: Was: Now: $15.00