Daansen 391S fuel tester/screw driver. The number one pilot’s tool to check fuel sumps for water
and dirt; check octane rating; test for alcohol in fuel; operate screw fasteners on cowls, inspection covers and fairings. Reversible tip screwdriver. Stores conveniently in flight case or airplane map pockets.
- Compact size – convenient to carry, store and use
- Easy-grip probe – remove without tools
- Clear, uncluttered body – no lettering in viewing area
- Test scale – measures percentage of alcohol in fue