51-16-01\tBELLANCA: Applies to All Models 14-13 and 14-13-2 Airplanes. \n\n\tCompliance required within the next 25 hours of operation, but not later than August 1, 1951. \n\n\tAs a result of a recent failure of the elevator trim tab in flight, the modification of the trim tab attachment to the elevator as shown in Figure 1 should be made. \n\n\n\n\nFIGURE 1 \n\n\t(Bellanca Service Bulletin No. 14, Models 14-13 and 14-13-2, covers this same subject.)