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Old 8th Oct 2019, 13:33
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FlyingStone
 
Join Date: Apr 2010
Location: IRS NAV ONLY
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FFS if only people bothered to open the forbidden manual called FCTM.

Memory items for target pitch and thrust must be accomplished as soon as it is
suspected that airspeed indications are incorrect. The intent of having memorized
pitch and thrust settings is to quickly put the airplane in a safe regime until the
Airspeed Unreliable checklist can be referenced. The following assumptions and
requirements were used in developing these memory items:
• The memorized settings are calculated to work for all model/engine
combinations, at all weights and at all altitudes.
• The flaps up settings will be sufficient such that the actual airspeed
remains above stick shaker and below overspeed.
• The flaps extended settings will be sufficient such that the actual
airspeed remains above stick shaker and below the flap placard limit.
• The settings are biased toward a higher airspeed as it is better to be at a
high energy state than a low energy state.
• These memorized settings are to allow time to stabilize the airplane,
remain within the flight envelope without overspeed or stall, and then
continue with reference to the checklist.
• Settings are provided for flight with and without flaps extended. The
crew should use the setting for the condition they are in to keep the
airplane safe while accessing the checklist.

The memorized pitch and thrust setting for the current configuration (flaps
extended/flaps up) should be applied immediately with the following
considerations:
• The flaps extended pitch and thrust settings will result in a climb.
• The flaps up pitch and thrust settings will result in a slight climb at light
weights and low altitudes, and a slight descent at heavy weights and
high altitudes.
• At light weight and low altitude, the true airspeed will be higher than
normal, but within the flight envelope. At heavy weight and high
altitude, the same settings will result in airspeed lower than normal
cruise but within the flight envelope.
• The goal of these pitch and thrust settings is to maintain the airplane
safely within the flight envelope, not to maintain a specific climb or
level flight.
• The current flap position should be maintained until the memory pitch
and thrust settings have been set and the airplane stabilized. If further
flap extension/flap retraction is required refer to PI-QRH Airspeed
Unreliable table.
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