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Home / Instruments / Davtron / 800 Series Clock /Davtron Model 850B-A With Gray Faceplate
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Davtron Model 850B-A With Gray Faceplate

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Part# 10-07460
MFR Model# M850B-A
Manufacturer Part NumberDescriptionPN
M850B-AM850B WITH GRAY FACEPLATE10-07460

Overview

The Davtron M850B is FAA Approved as an advanced time-keeping device equivalent and hence a replacement for the sweep-second-hand clocks of old. The unit is considered a replacement for clocks in Part 23, Class I and II IFR aircraft per advisory circular AC 20-94A.
   
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Features

  • 2 ¼" internal mount or front mount
  • Two button control system
  • Greenwich mean time
  • Local time
  • Flight time with alarm
  • Elapsed time with alarm
  • Countdown timer with alarm
  • Option audio alarm
  • Bright sunlight readable display
  • Automatic dimming
  • Illuminated buttons and annunciators
  • FAA Approved

Specifications

  • Greenwich Mean Time: 24 hour format
  • Local Time: 12 hour or 24 hour
  • 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 and 59 seconds
  • Elapsed Time Alarm: Activates at zero when counting down
  • Count Down Timer: Settable from one second to 59 minutes and 59 seconds. LED Displays: Readable in sunlight
  • Automatic Dimming
  • Battery Type: CR2032
  • Keep Alive Current: .00004 amps
  • Input Current: 0.2 Amps
  • Input Voltage: 14 to 28 Volts (backlight available 5V, 14V, or 28V lighting)
  • Black Face Plate: Engraved Nomenclature
  • Grey Face Plate: Silkscreened Nomenclature
  • Weight: 5 ounces
  • Warranty: 1 year

FAA Approval

  • 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 or NORSEE Approval from the FAA. For a major installation, a FAA 337 form may need to be filed with your local FSDO and a possible field approval done.

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Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.