Aspen Avionics Tech Note 2009-01


Effective immediately, Aspen Avionics will begin shipping all EFD1000 PFDs with the internal battery disconnected. This action has been taken to prevent inadvertent discharge of the internal battery, associated effects on battery circuit logic and perceived failures.
The internal battery can be unintentionally discharged a number of ways including:
  1. Pushing the “REV” button prior to installing the EFD1000 (causes the EFD1000 to power up on battery)
  2. Insufficient external power (or low aircraft main battery voltage) supplied to the EFD1000 during post installation testing.

It is recommended that the battery remain disconnected during shipment, storage, installation, configuration, preliminary testing and any necessary debugging.


35 years component-level Aviation/Electronics repair/Avionics retrofit experience. FCC General Radiotelephone with Ship Radar. Navcom-Audio, Transponder-Pulse-Radar, Autopilot expertise. IT Administration since 1983. Private Pilot since 1986. CAD designer since 1990. FAA Certified Repair Station Chief Inspector since 1994. Started 3 Avionics Shops. College: Business Administration/Marketing. Motorcycle enthusiast. 6 year USAF Veteran, Ground Radio Equipment Technician (30474, E-5). WordPress novice.

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