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. transponder altitude reporting
. stall warning computers
Air Data Computers Two air data computers (ADCs) are installed. Each ADC receives pitot and static pressure inputs from the respective pilot’s P/S system. The ADCs convert these pressure inputs to electrical signals which are used to operate various flight instruments and airplane systems. The ADC computers are powered whenever the AC busses are powered. Copyright . The Boeing Company. See title page for details. 10.20.2 December 1, 2000 Flight Instruments, Displays - System Description 737 Operations Manual Pitot–Static System Schematic 2 STANDBY ELECTRIC INERTIAL PNEUMATIC ELECTRIC INERTIAL PNEUMATIC ELECTRIC ELECTRIC MACH VERTICAL AIRSPEED/ METRIC MACH VERTICAL ALTIMETER ALTIMETER AIRSPEED SPEED ALTIMETERALTIMETER AIRSPEED SPEED AIR DATA AIR DATA COMPUTER NO. 1 COMPUTER NO. 2 CAPT PITOT F/O PITOT CAPT STATIC F/O STATIC NO. 1 AUX STATIC NO. 2 AUX STATIC NO. 2 AUX PITOT NO. 1 AUX PITOT FLAP LOAD LIMIT FLAP LOAD LIMIT AIRSPEED SWITCH AIRSPEED SWITCH 1 1 PRESSURIZATION CONTROL PITOT CABIN ALTIMETER CAPT & F/O STATIC AND DIFFERENTIAL PRESSURE NO. 1 & NO. 2 AUX STATIC ALTERNATE STATIC ALTERNATE STATIC # As installed Copyright . The Boeing Company. See title page for details. December 1, 2000 10.20.3 Flight Instruments, Displays -System Description 737 Operations Manual
Total Air Temperature One TAT probe is installed. On some airplanes, the TAT probe is aspirated. It provides independent temperature data to each ADC. Total air temperature data derived from ADC No.1 is used by the left IRS, the FMC, autothrottle, FCC “A” and the air temperature indicator. Total air temperature derived data from ADC No. 2 is used by the right IRS, the FMC, autothrottle and FCC “B.”
TAT PROBE ASPIRATED TAT PROBE LEFT FORWARD FUSELAGE Copyright . The Boeing Company. See title page for details. 10.20.4 December 1, 2000
Flight Instruments, Displays -System Description 737 Operations Manual The inflight TAT indication is comprised of outside air temperature (OAT) plus all of the ram rise. On the ground, the TAT indication is approximately OAT if pitot heat is OFF. With an aspirated TAT probe installed, the TAT indication on the ground is approximately OAT when an air conditioning pack is switched to AUTO or HIGH. In flight, the following table is used to convert indicated TAT to true OAT. INDICATED MACH NUMBER .30 .40 .50 .60 .70 .73 .76 .78 .80 .82 .84 IND TAT - °C TRUE OUTSIDE AIR TEMPERATURE - DEGREES C 70 47 39 37 35 33 31 29 27 65 49 42 35 33 30 28 26 25 23 60 49 44 37 30 28 25 24 22 21 19 55 49 45 40 33 26 24 21 19 18 16 14 50 45 40 35 28 21 19 17 15 13 11 10 45 40 35 30 23 17 15 12 11 9 7 5 40 35 30 25 19 12 10 8 6 4 3 1 35 30 26 20 14 8 6 3 1 0 - 2 - 3 30 25 21 16 10 3 1 - 1 - 3 - 5 - 6 - 7 25 20 16 11 5 - 2 - 3 - 6 - 7 - 9 -11 -12 20 15 11 6 0 - 6 - 8 -10 -12 -13 -15 -16 15 10 6 2 - 5 -11 -13 -15 -16 -18 -19 -21 10 5 1 - 3 - 9 -15 -17 -19 -21 -22 -24 -25 5 0 - 3 - 8 -14 -20 -21 -24 -25 -27 -28 -29 0 - 5 - 8 -13 -18 -24 -26 -28 -30 -31 -33 -34 - 5 -10 -13 -18 -23 -29 -31 -33 -34 -35 -37 -38 -10 -15 -18 -22 -28 -33 -35 -37 -39 -40 -41 -43 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300机组操作手册Flight Crew Operations Manual FCOM 3
