The bulletin
Text extracted from the PDF.
SPECIAL
AIRWORTHINESS
INFORMATION
BULLETIN
Aircraft Certification Service Washington, DC
U.S. Department of Transportation Federal Aviation Administration
CE-04-63 April 16, 2004 www.faa.gov/certification/aircraft This is information only. Recommendations aren’t mandatory.
Introduction
This Special Airworthiness Information Bulletin provides you, owners and operators of New Piper Aircraft models PA-28-140, PA-28-150, PA-28-160, PA-28-180, and PA-28-235 airplanes, with information concerning the correct configuration for the skin surfaces of the ailerons, flaps, and stabilators.
Background
Early model PA-28 aircraft were manufactured with skin stiffener beads on the control surfaces formed out. Later, PA-28 surfaces, including current models, were manufactured with the beads formed in. Currently, replacement surfaces are provided only with the beads formed in.
Consequently, when a control surface or its skin requires replacement on airplanes with outward facing beads, this creates confusion.
Recommendation
It is acceptable for stiffening beads on control surfaces to be formed in or out, provided both left and right sides are formed the same. The skin for a particular pair of control surfaces cannot be mismatched. Right and left ailerons must match, as do right and left flaps or right and left stabilators.
It is not necessary for unlike surfaces (flaps compared to ailerons) to be similarly configured. For example, an aircraft may have flap skins with the beads formed in, and aileron skins with the beads formed out.
When installing a replacement aileron, flap, or stabilator, or performing a repair that necessitates replacing the control surface skins, you should ensure that the bead configuration is identical to the opposite surface.
For Further Information Contact
William O. Herderich, Aerospace Engineer, Atlanta ACO; FAA Small Aircraft Directorate; One Crown Center; 1895 Phoenix Boulevard, Suite 450; Atlanta, Georgia 30349; phone: (770) 703-6082;
fax: (770) 703-6097; email: william.o.herderich@faa.gov
Registered aircraft it may concern
Registry models matched by Piper Aircraft, Inc., The New PA-28-140, PA-28-150, PA-28-160 and 2 more, the same way as ADs, with the most registered aircraft first.