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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
Airworthiness Directives; Piper Model PA-23 Aircraft
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AGENCY: Federal Aviation Administration, DOT
56-27-03 PIPER: Applies to Model PA-23, Serial Numbers 23-1 Through 23-800 Except 23-732, 23-736, 23-739, 23-740, 23-741, 23-769, 23-777, 23-784, 23-787, 23-794, 23-797 and 23-799.
Compliance required by February 1, 1957.
In order to prevent fatigue cracking in the aileron balance weight bracket at a point where the bracket tubes are welded to form a 90 degree angle, it will be necessary to remove both the right and left aileron balance weight brackets and reinforce them with gussets, Piper P/N 17126- 07 in accordance with the instructions and sketch contained in Piper Service Bulletin No. 149 dated December 10, 1956.