![]() ![]() NB Where QRH ENGINE FAILURE/SHUTDOWN drills ask “If wing anti-ice is ![]() Level where it will be exposed to icing conditions. This is because the MMA will be spending long periods of time on patrol at low That the 737-MMA will have raked wingtips with anti-ice along the full span. To be due to excessive bleed requirements. The NG series outboard slat has no wing anti-ice facility (see photo) believed Only the leading edge slats have WAI (ie not leading edge flaps). Pneumatic manifold, this is to ensure a source of bleed air during engine out WAI, unlike engine AI, uses bleed air from the main Lift-off ie "armed", This is opposite to the present system. Position, with the WAI switch ON on the ground, the WAI is inhibited until Note that on early systems, ie those with a GND TEST Trip off at lift-off, this is for performance considerations as the bleed air This allows you to perform engine run-upsĮtc without having to check that the WAI is still on afterwards. If either thrust lever is above the take-off warning setting, but will be The WAI switch logic is interesting, on the ground, bleed air for WAI will cut-off System in-flight, in applications of 1 minute. Wing anti-ice (WAI) is very effective and is normally used as a de-icing See Instrument Probes page for explanation. The OVHT TEST simulates an overheat condition. Window heat must be switched OFF and allowed 2-5mins to cool before switching ONĪgain. Overheated or electrical power to the window has been interrupted. If an OVERHEAT light illuminates, either a window has TEST forces the temperature controller to full power but overheat protection is TEST should illuminate all ON lights if the window heat switches are ON. To verify that window heat is still available a PWR The heat will automatically be restored when Is becoming overheated (normal on hot days in direct sunlight) and can be This could be because the heat controller has detected that the window If window heat is switched ON but the ON light isĮxtinguished, this means that heat is not being applied to the associated ![]()
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