Piper Warrior III - INSPECTION AND REPAIR; GENERAL; FUEL TANK; WING SPAR CORROSION INSPECTION

PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 2
Nov 30/06
2J16
28-10-00
C. Inspection and Repair
(1) General
W
ARNING: SLOSHING OF FUEL TANKS IS PROHIBITED.
(a) Inspect each tank for signs of leaks (indicated by telltale stains).
(b) If leaks are detected, seal with Products Research Corporation (PRC) PR1422A series or
PR1433G series sealant.
NO
TE
: The fuel tank should be replaced if the tank is damaged to the extent it cannot be
repaired by the above method.
(2) Fuel Tank / Wing Spar Corrosion Inspection (Paragraphs (a) and (b), below, keyed to Figure 1.)
(a) Each seven calendar years time-in-service, remove the fuel tanks and conduct
inspections as specified below. Each inspection is for corrosion (intergranular, exfoliation,
etc.), but while exposed all areas and parts should be checked for other anomalies such
as damage, cracking, or wear. Any part or area determined to be defective must be
repaired or replaced using standard FAA approved parts and methods.
A1. Inspect the fuel tank attach hardware and gang channels (nut plate strips).
A2. Inspect the exterior of the fuel tanks for leaks. Inspect the interior for corrosion or
sloshing compound. If either condition exists, clean, repair, or replace the fuel tank as
required.
A3. Remove fuel quantity senders. Inspect for condition, operation, and security and
freedom of movement of the float arm. Inspect condition of wires and terminals.
Replace components as required. Replace gaskets.
A4. Inspect hard fuel vent lines for interior and exterior corrosion, wear, or deposits. Flush
and clean with mineral spirits under pressure. If excessive debris, deposits, or
corrosion observed, replace the line.
A5. Inspect flexible fuel hoses and couplings. Replace as required. Replacement is
recommended regardless of serviceability.
A6. Inspect the spar, spar angles (cap), and ribs behind and adjacent to the fuel tank. If
corrosion is detected, conduct a thorough inspection of the entire wing.
A7. Remove the lacing at the wing root and inspect the spar and forward wing attach
fittings.
(b) Treat the following areas with Dinotrol AV 8 before reassembly.
B1. Wing spar at root and forward wing attach fittings.
B2. Entire wing spar, spar angles (cap), and ribs behind and adjacent to the fuel tank.