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Products


M877 Features

  • 2 ¼" INTERNAL MOUNT
  • TWO BUTTON CONTROL SYSTEM
  • GREENWICH MEAN TIME
  • LOCAL TIME
  • FLIGHT TIME WITH ALARM
  • ELAPSED TIME COUNTER WITH COUNTDOWN TIMER
  • ELASPED TIME ALARM
  • OPTION AUDIO ALARM
  • BRIGHT SULIGHT READABLE DISPLAY
  • AUTOMATIC DIMMING
  • ILLUMINATED BUTTONS AND ANNUNCIATORS
  • KEEP ALIVE BATTERY OPTION
  • FAA-PMA APPROVED

# # #
Model 877 operational input is 11V - 30V. The referenced 5V, 14V and 28V listed below identify lighting configuration for the backlight operation for nightime viewing. Local Time is user selectable 12 or 24 hour. If customer request custom set-up from the factory, contact Davtron.

Part Number Part Description
M877-5V MODEL 877-5V GMT, LT, FT, & ET LED CLOCK 5V ILLUMINATING BUTTONS (REAR MOUNT) M877
M877-14V MODEL 877-14V GMT, LT, FT, & ET LED CLOCK 14V ILLUMINATING BUTTONS (REAR MOUNT)
M877-28V MODEL 877-28V GMT, LT, FT, & ET LED CLOCK 28V ILLUMINATING BUTTONS (REAR MOUNT)
M877A-5V MODEL 877-5V WITH GRAY FACEPLATE
M877A-14V MODEL 877-14V WITH GRAY FACEPLATE
M877A-28V MODEL 877-28V WITH GRAY FACEPLATE
SONALERT AUDIO ALARM FOR MODELS 800, 803, 850 & 877
M800R-5V *MODEL 800R-5V REMOTE UNIT 5V LIGHTING FOR MODEL 850 & 877
M800R-14V *MODEL 800R-14V REMOTE UNIT 14V LIGHTING FOR MODEL 850 & 877
M800R-28V *MODEL 800R-28V REMOTE UNIT 28V LIGHTING FOR MODEL 850 & 877
M800R-28V-NVG *MODEL 800R-28V WITH NIGHT VISION LIGHTING GREEN A

*REMOTE UNIT FOR MODEL 850 AND MODEL 877

  • Greenwich Mean Time: 24 hour format
  • Local Time: 12 hour or 24 hour option
  • Flight Time: Records in hours and minutes, up to  99:59, 99.99 hour option
  • Flight Time Alarm: Full set range flight time
  • Elapsed Time Count Up: Starts in minutes and seconds, then hours and minutes, up to 99:59 hours
  • Elapsed Time Countdown: Settable from one second to 59 minutes, 59 seconds
  • Elapsed Time Alarm: Activates at zero when counting down
  • Incandescent Displays: Readable in sunlight
  • Automatic Dimming
  • Battery Type: N size alkaline Model 850
  • Battery Type: AA size alkaline alkaline Model 877
  • Keep Alive Current: .00004 Amps
  • Input Current: .2 Amps
  • Input Voltage: 14 to 28 Volts (Backlight available 5V, 14V, or 28V lighting - Specify when ordering)
  • NVIS Option: NVIS Green A lighting for Model 850
  • Black Face Plate: Engraved Nomenclature
  • Grey Face Plate: Silkscreen Nomenclature
  • Weight: 5 ounces
  • Warranty: 1 year


 

Davtron Inc has determined that installation of all Davtron products are considered minor according to (FAR) 21.93(a).  All of our units are similar in design, with their electrical, mounting size, and weight being similar.  Even though we consider installation of Davtron products to be minor, it is up to the installing mechanic to determine if the installation is minor or major.  For a minor, a maintenance log book entry is all that is required.   The FAA has determined that the installation of replacement clocks in non-transport category airplanes is considered to be minor, therefore only a maintenance log book entry is required referencing letter 100S-GA-10-53 from the FAA.  For a major installation on a non PMA approved airframe, a FAA 337 form should be filed with your local FSDO and a possible field approval done.   FAA PMA# PQ1062NM  (View a sample 337 form)

Davtron Inc. recommends that you purchase our products through your local avionics shop and have them do your installation. They know how to handle all the log book entries you need for FAA approval.

INSTALLATION ELIGIBILITY

  • Mystere Falcon 50 and 900
  • Learjet Airplanes 35A and 60
  • BAE Jetstream Model 4101



Frequently Asked Questions

 

Q: My clock is not keeping time, why not?

A: Replace AA memory battery on back of unit.

 

Q: When trying to set time, FT, or ET, more than the flashing digit is changing, what is wrong?

A: The clock IC has failed and needs to be replaced.

 

 

Q: One of my digits is missing, how do I fix it?

A: The digits are field replaceable, and mounted in sockets. All 4 digits are KW115G.