To Operate Elapsed Time Timer-Count Up Mode - Cessna 172S NAV III Pilot Operating Handbook

SECTION 9 - SUPPLEMENTS
SUPPLEMENT 7
CESSNA
MODEL 172S NAV III
NORMAL PROCEDURES
(CONTINUED)
TO OPERATE ELAPSED TIME TIMER-COUNT UP MODE:
1. OFFNOL Control - ON
2. FLT/ET Mode Button - PRESS (once or twice) until ET is
annunciated.
3. SET/RST Button - PRESS momentarily to reset elapsed timer to
zero.
NOTE
The Stand by Frequency which is in memory while Flight
Time or Elapsed Time modes are being displayed may be
called back by pushing the FRQ button, then transferred to
active by pushing the FRQ button again.
TO OPERATE ELAPSED TIME TIMER COUNT DOWN
MODE:
1. OFFNOL Control - ON
2.
FLT/ET Mode Button - PRESS (once or twice) until ET is
annunciated.
3.
SET/RST Button - PRESS until the ET annunciation begins to
flash.
4.
FREQUENCY SELECTOR KNOBS - SET desired time in the
elapsed time display. The small knob is pulled out to tune the 1's.
The small knob is pushed in to tune the 10's. The outer knob
tunes minutes up to 59 minutes.
NOTE
Selector knobs remain in the time set mode for 15 seconds
after the last entry or until the SET/RST, FLT/ET or FRQ
button is pressed.
5. SET/RST Button - PRESS to start countdown. When the timer
reaches 0, it will start to count up as display flashes for 15
seconds.
NOTE
While FLT or ET are displayed, the active frequency on the
left side of the window may be changed, by using the
frequency selector knobs, without any effect on the stored
standby frequency or the other modes.
S7-10
U.S.
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FAAAPPROVED
172SPHAUS-S7-00