Thumbs 1
Thumbs 1


Part# 10-25520-14
MFR Model# 803-14V
DescriptionPart No.
M803 WITH 14V LIGHTING10-25520-14


Davtron M803 Features:

  • 2-1/4" internal mount
  • Laser engraved faceplate
  • Universal time
  • Local time
  • Flight time with alarm
  • Elapsed time with countdown timer
  • Elasped time alarm
  • option audio alarm
  • Liquid crystal display
  • Voltage
  • O.A.T fahrenheit & centigrade
  • Night illumination
  • Nvis green a option
  • Keep Alive battery option
  • FAA/PMA Approved
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.

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 from the FAA.
  • Download Letter
  • 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 Approval
  • Bell Helicopter Textron Model 407
  • Download FAA 337 Form.


  • Universal Time: 24 hour format
  • Local Time: 12 hour or 24 hour option
  • Flight Time: Records in hours and minutes, up to 99:59
  • Flight Time Alarm: Full set range of flight time
  • Elapsed Time Count Up: Starts in minutes and seconds, then hours and minutes, up to 99:59 hours
  • Elasped Time Countdown: Settable from one second to 59 minutes and 59 seconds
  • Elapsed Time Alarm: Activates at zero when counting down
  • Voltage Range: 8 Volts to 32 Volts 0.2 Volts Typ. -55C to +100C 0.2C Typ.
  • Internal Lighting: 240 mA at 5V, 240 mA at 14V, 100 mA at 28V (specify voltage when ordering)
  • Keep Alive Current: 0.004 Amps. 12 to 30 Volts
  • LCD Display
  • Input Voltage: 12 to 30 Volts
  • Input Current: .2 Amps
  • Battery Type: AA memory battery
  • NVIS Option: NVIS Green A lighting
  • Voltage: 12 to 30 Volts
  • Weight: 5.02 ounces
  • Warranty: 1 year
  • Accessories
  • Frequently Purchased With
  • Customers Also Viewed


Everything working fine so far. Keep alive function is wired direct to battery (with a 1/4a fuse protection). Hopefully will keep accurate time. So far so good!

Stephen L Verified Purchase


June 17, 2021

Weve been using these for years in our helicopters, and they are fantastic. They got rid of two things, the OAT gauge and the clock, but this has the bonus of being a system volt gauge as well. The clock has several timing features which is great also. This current purchase was to replace an original unit that finally started giving out, some segments werent showing up and some buttons werent functioning correctly.

Wayne Y
November 1, 2018


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.

Q: Does the Davtron Digital M803 clock come with the temp probe and connector?

The Davtron Digital Clock M803 comes with the unit, connector kit, OAT Probe and installation instructions.

Q: Can the lights be replaced in my existing m803?

Yes, the lights can be replaced by taking the case apart. The manufacturer can also repair the unit, visit for further information.

Q: What is the P/N of the probe for the M803?

Per the manufacturer 11-04603 will work.

Q: Can lights be changed to blue? Also, the temp probe and wire come with the M803, correct?

This comes with the unit, connector kit, oat probe, and install instructions. Blue light on display is not available, only option is NVIS green lighting.

View in Catalog

View Image View in Catalog