Fluid Application Procedures Jet Aircraft

Sensors, Probes, & Ports

Clear probes mechanically. Do not spray directly, though in some cases, indirect spray wash-down may be acceptable. Spraying into openings such as static ports, pitot tubes, air intakes, temperature sensors, etc. can damage the equipment. Residues can cause faulty readings.

Fluid Application Procedures Jet Aircraft

Fuselage

Start at the top, sweep top to bottom. Spraying the upper section with a heated fluid first allows the fluid to flow down, warming the sides of fuselage and removing accumulations. Be careful not to damage protruding equipment (e.g., antennae).

Fluid Application Procedures Jet Aircraft

Landing Gear (including doors, wheels, and wheel bays)

Use heated air, if available, but avoid overheating. If de-icing fluid is your only option, use a low pressure fan spray or mist to avoid forcing fluid into bushings or damaging wiring. Some manufacturers say to avoid spraying fluid directly onto wheels and brakes. If tires are frozen to the ground, spray or heat lightly at the tire base.

Fluid Application Procedures Jet Aircraft

Wing

Sweep from leading to trailing edge. Failure to do so could force contamination into aerodynamically quiet areas. You may start at the wing tip or root. For anti-icing, the goal is to coat the wing with a nominally uniform layer.

Fluid Application Procedures Jet Aircraft

Engine - Jet

Assuring that the inlet nacelle anti-ice heat is turned on while operating on the ground will reduce inlet ice build-up and may assist in ice removal. Avoid glycol spray near the inlet of the engine since the fluid may damage the engine and glycol vapors could enter the aircraft cabin area through the engine bleed air system.

Fluid Application Procedures Jet Aircraft

APU

Start at the top, sweep front to back.

Fluid Application Procedures Jet Aircraft

Horizontal Stabilizer

Sweep from leading to trailing edge. Make sure the anti-icing fluid forms a nominally uniform layer.

Fluid Application Procedures Jet Aircraft

Vertical Stabilizer

Start at the top, sweep front to back.

Fluid Application Procedures Jet Aircraft

Cowling

Remove contaminants from the area forward of the windscreens so they don’t blow back during takeoff and obscure your vision and/or be ingested into your engine intakes. For turboprop and piston airplanes, de-ice mechanically (broom, squeegee, hot air, etc.), de-ice with fluid prior to start, or shutdown to spray and then restart.

Fluid Application Procedures Jet Aircraft

Radome

De-ice to eliminate snow/ice from being projected into your field of view during take-off, and ensure proper operation of any sensors in this area.

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