Piper STC's
SA1-167 for PA-20 (issued 2-14-58)
SA1-275 for PA-22 (issued 11-13-58)
SA1-373 for PA-12 (issued 10-22-64)
SA1-51 for PA-14 (issued 6-21-62)
SA1-573 for PA-14 (issued 5-29-61)
