Airworthiness Notice - B068, Edition 1 - 10 June 2003
Piper PA28 Series
Aileron, Flap and Stabilator Skins
Purpose
The purpose of this notice is to provide information concerning the correct
configuration for the skin surfaces for the ailerons, flaps and stabilators on
PA28 aircraft.
Background
Early model PA28 aircraft were identified by the "0" in the model
designation such as the PA-28-140, -150, -160, -180 and included the PA28-235
models as well as earlier models of the PA28R-180 and 28R-200 and are listed in
Piper Illustrated Parts Catalog, part number 753 582. These aircraft have the
constant chord wing and were manufactured with the titled skin surfaces having
the bead "Out" configuration
Near the end of the production of the models mentioned in the above
paragraph, the manufacturing of the titled skin surfaces changed to the bead
"In" configuration. However, it could not be determined by aircraft
serial numbers where these change occurred.
Later model PA28 aircraft were identified by the "1" in the model
designation such as the PA28-151, -161 etc., and have the tapered wing
configuration; these aircraft models incorporate only the bead "In"
configuration on the titled skin surfaces.
Acceptable Configurations
Regardless of the original configuration when manufactured, the beads on the
control surface may be dented bead "In" or bead "Out" as
long as both sides are dented the same; the skins for particular control
surfaces cannot be mismatched. For example, both aileron skin surfaces must have
either beads dented "In" or beads dented "Out". Similarly,
all the skins on the flaps and stabilator must match.
It is not necessary for unlike control surfaces [flaps compared to ailerons]
to be similarly configured. For example, an aircraft may have both flap skins
with the beads dented "In" and both aileron skins with the beads
dented "Out".
Operators and owners must be cognizant of these acceptable configurations,
particularly when performing repairs that necessitate replacing control surface
skins and be aware of the applicable Parts Catalog for their aircraft model and
serial number.
For Minister of Transport
Martin J. Eley
Director, Aircraft Certification
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