PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 4
Nov 30/06 4H14
57-50-00
D. Skin Bead Repair (Refer to Figure 3.)
CA
UTION: CONTROL SURFACE SKINS MUST BE REPLACED IF THEY SUSTAIN DAMAGE OR
EXHIBIT CRACKS. LIMITED REPAIRS TO AILERON SKINS ARE AUTHORIZED
ONLY AS PROVIDED IN THIS MANUAL.
NO
TE
: This repair is authorized only as a temporary measure until replacement parts (i.e. - skins)
can be obtained and installed.
(1) Limitations
Repair of minor cracks in aileron control surface skins only is authorized, but limited as follows:
(a) Cracks of no more that 0.5 inch at the ends of the skin stiffening beads;
(b) No more than two cracks per surface side.
(c) Cracks are limited to either end of a bead (see Figure 3), but not on the same bead;
(d) For wrap-around skins, two crack repairs are acceptable per side, but repairs may not be
opposite to one another on opposite sides (i.e. - top and bottom).
(2) Procedure
Only cracks confined to the bead end area shown in Figure 3 may be repaired.
(1) Cracks 0.5 inch long or less may be repaired by stop drilling;
(2) Stop drill the extreme ends of the crack with a #50 (0.070) drill.
NO
TE: Cracks stop drilled once cannot be stop drilled again, should crack growth
continue.
Skin Bead Repair
Figure 3
0.5 INCH MAX.
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