What it approves
Removed 18 from the outboard end of each wing. Removed the first rib inboard of bow, and also the bow. Manufactured from .032 24ST al. Alloy sheet, a full size rib, installed on wing in place of the rib removed. Manufactured skin from .025 24ST and installed on wing, fastened to the first and second rib with #4 sheet metal screws. Three 4 lightning holes were cut in the new rib for inspection purposes and 8-32 nutplates were riveted to inside of rib for attaching of tip plate. The outboard ends of the ailerons were modified to conform to the chord length of the wing. The completed assembly is fabric covered upon covering of wing. The material for the Tip Plate is Prestwood T. and protrudes in a chordwise manner 1-3/4 .
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
Forrest Alan Frazier 5619 Fifth Street Augusta, MO 63332
4a Civil Air .
- A-691 Piper J3C-65
Removed 18” from the outboard end of each wing. Removed the first rib inboard of bow, and also the bow.
Manufactured from .032 24ST al. Alloy sheet, a full size rib, installed on wing in place of the rib removed.
Manufactured skin from .025 24ST and installed on wing, fastened to the first and second rib with #4 sheet metal screws. Three 4” lightning holes were cut in the new rib for inspection purposes and 8-32 nutplates were riveted to inside of rib for attaching of tip plate. The outboard ends of the ailerons were modified to conform to the chord length of the wing. The completed assembly is fabric covered upon covering of wing.
The material for the Tip Plate is Prestwood ¼” T. and protrudes in a chordwise manner 1-3/4”. Drawings attached: R.M. Frazier drawings 1, 2, 3 and 4.
Compatibility of this design change with previously approved modifications must be determined by the installer. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.
December 1, 2006; January 12, 2007
Original signed by Erik Brown (Signature) Erik W. Brown Program Manager Wichita Aircraft Certification Office (Title)
June 30, 1957 October 10, 1957
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 1
| Make | Model | Data sheet |
|---|---|---|
| Piper Aircraft Inc. | J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2)) | A-691 |