Instrument System

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TTP
B1-L3
ATA31
Cessna 172
B2-L3

Instrument panel is divided into sections to facilitate easy removal and installation of particular components without removing the entire panel.
Pilot side of the instrument panel is broken up into three separate panels, with the flight instruments grouped in a panel, the avionics dials and tachometer located in a panel, and the indicating/recording instruments grouped in a third panel.
Switch panel is located below the pilot side instrument panel and houses the majority of switches and circuit breakers in a single location.
Copilot side of the instrument panel houses the Hobbs meter and remote ELT activation switch, and is designed to allow for panel expansion.
Digital clock is located in upper left side of the instrument panel and incorporates clock, temperature and voltage readings in a single unit.
Hour (Hobbs) meter is located in the upper right corner of the instrument panel and provides indication of flight hours based on engine operation, receives power through the WARN circuit breaker located on the lower instrument panel.  Grounded through the Oil Pressure Switch, and anytime oil pressure exceeds 20 PSI a ground is sent from the switch to the hour meter, completing a circuit and activating the hour meter.
ANNUNCIATOR PANEL  is a multi-system display which provides visual warning and caution information related to various systems and fuel levels throughout the airplane.  Presents  visual information in either amber (caution) or red (warning) messages.
 Annunciator Panel Messages and Inputs
PTP
Cessna
172
B1
LOC
FOT
SGH
R/I
MEL
TS
B2
LOC
FOT
SGH
R/I
MEL
TS


311001 Instruments - Check general condition and markings for legibility.
311003 Instrument Lines, Fittings, Ducting, and Instrument Panel Wiring - Check for proper

routing, support, and security of attachment.

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