Repeat Switch
Push – initiates or repeats transcribing of the trip and date information.
Recording Time Remaining Indicator
.
not used
.
should always read above zero.
OFF Light
Illuminated (amber) – indicates the recorder is not operating or the test is invalid. May indicate power failure, loss of input data, or electronic malfunction:
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Flight Instruments, Displays -Controls and Indicators
Aircraft Condition Monitoring System (ACMS) Interactive Display Unit and Printer
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Flight Instruments, Displays -Controls and Indicators 737 Operations Manual
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Flight Instruments, Displays -Controls and Indicators 737 Operations Manual
EVENT Switch
Push – marks specific occurrence for future reference.
PRINT Switch
Push – initiates printing of desired data.
SLEW Switch
Advances paper feed.
TEST Switch
Initiates self–test to print character list.
RESET Switch
Resets printer.
Flight Instruments, Displays -Controls and Indicators 737 Operations Manual
PAPER Indicator
Indicates paper level.
FAIL Light
Indicates printer failure.
PAPER Light
Indicates paper supply is exhausted.
Message (MSG) Light
Indicates message pending on printer.
Interactive Display Unit (IDU)
Cursor (typical)
Moves right as each character is entered.
Alpha Pad
Touch – individual characters are entered in data display.
MENU Cue
Touch – displays previous menu.
Advisory Space
Advisory may be displayed as flashing, reverse, or normal video.
Data Display
Data appears here as entered.
Numerical Pad
Touch – individual characters are entered in data display.
Enter (ENT) Cue
Touch – enters data and turns page if entering final data.
Clear (CLR) Cue
Touch – blanks character under cursor and to its right.
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Flight Instruments, Displays -Controls and Indicators 737 Operations Manual
Paper Advance (PPR ADV) Switch
Push – advances printer paper as long as switch is held down.
SELF TEST Switch
Push – produces a test pattern as long as switch is depressed.
Power On (PWR ON) Light
Illuminated (green) – power is applied to printer.
ALERT RESET Switch
Push – resets aural/visual printer alert.
Printer Busy (PTR BUSY) Light
Illuminated (amber) – printer is processing message text.
Flight Instruments, Displays -Controls and Indicators 737 Operations Manual
Intentionally
Blank
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737 Operations Manual
Introduction
The flight instruments provide information to aid the pilots in controlling the airplane throughout its flight regime. The electric flight instruments receive input from one of the two air data computers. The pneumatic flight instruments receive input directly from the pitot–static system.
Air Data System
The air data system consists of the pitot–static system and the air data computers. The system provides pitot and/or static pressure information to various flight instruments and airplane systems. The pressure information is provided in one of two ways; either directly from the pitot–static system, or indirectly from an air data computer.
Pitot Static System
The pitot–static (P/S) system provides pitot and static pressure inputs to pressure–sensing instruments and systems which have functions that vary with altitude and/or airspeed.
There are four primary P/S systems; the Captain’s, the First Officer’s, No. 1 auxiliary, and No. 2 auxiliary. The pilots’ systems are used by the flight instruments and air data computers. The auxiliary systems are used by various airplane systems.
The alternate static system provides static pressure inputs to the standby airspeed indicator/standby altimeter.
Pressure inputs to the primary P/S systems are provided by four combination pitot and static probes located the forward fuselage. Each probe provides one pitot and two static inputs. The alternate static ports are located on each side of the fuselage. All static systems are cross–connected for dynamic balance.
A separate pitot system with probes mounted on the vertical stabilizer is provided
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