This manual is a supplement to the de Havilland Maintenance Manual PSM 1-2-2 and is made necessary as a result of converting the DHC-2 to turbine power using Wipaire STC SA0118CH. Maintenance, repairs and modifications accomplished on this airframe must be compatible not only with the original airframe, but with the modifications as installed. This supplement is considered a controlled document, and thus revisions must be kept up to date and are available on our Web site at http://www.wipaire.com or by calling Wipaire at 651-286-6609. It will be noted that the modification is accomplished with the use of existing, easy to obtain parts and accessories. For example, the forward cowling is that of a Beechcraft 90 series aircraft and many of the systems are almost identical to the Cessna 208. This manual, while not a complete parts manual, does reference most of the parts necessary for maintenance and continued airworthiness…..

By Date Item No. Description 4. Check rubber “swing valves” (check valve) located at wing station 123.5 for security and operation. These valves are inspected through the aluminum plugs located on each lower wing panel leading edge at station 121.5. Check valve for security and operation. Valve may not seat 100% with no fuel in tank. CAUTION DRAIN FUEL BEFORE REMOVING PLUG FOR INSPECTION. Rubber valve is Cessna part number 9912071-2. Reinstall plug, “O” ring (p/n MS29513-116), and safety wire. 5. Check engine driven fuel pump filter for foreign matter. Replace element. 6. Fuel Selector Valves and Linkages (Wing Area) - Inspect shut-off valves, controls and linkage for condition, security and evidence of damage. Inspect all fuel selector valve arms for proper contact with the off stop pins. Rerig if necessary. 7. Check auxiliary fuel pump, ejector pump, swing check valves and fuel shut-off valve screens for damage and security of installation. (Access cover on top of reservoir.) 8. Check engine fuel shut-off control for damaged conduit, security and freedom of movement; spring lock for sufficient compression. 9. Inspect header tank for damage, security and leaks. 10. Inspect fuel transfer and vent lines from wings for damage, security and leaks. 11. Inspect fuel caps for leakage, deterioration, and proper operation. 12. Inspect wing fuel tanks for leaks in leading edge and aft of forward spar. 13. Inspect fuel transmitters and wiring for security. 14. Inspect all fuel lines for leaks with engine fuel shut-off lever OFF and fuel booster pump switched to ON. Check low fuel pressure light goes out. Check pump runs in “normal” position. 15. Drain sufficient fuel from header tank and check that low fuel level light comes on. Approximately 7.5 gallons will be remaining. (Header tank capacity is 12.5 gallons.) 16. Drain sufficient fuel from wings and check that low fuel level light comes on. Approximately 15 gallons of fuel will be remaining in each wing. 17. Check that audible hom and annunciator are operational with both fuel selectors in the OFF position….

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