Aspen Partner adds “Altitude Preselect” to Legacy Autopilots

APS4A_04Aspen has partnered with Avionik Straubing to add altitude preselect to certain autopilots using the Aspen EFD1000 PFD Pro and the Avionik Straubing APS4A Altitude Preselect System.

 The APS4A is an add-on LRU that activates the autopilot’s altitude hold mode when triggered by the PFD Pro’s altitude alerter output. When discussing the APS4A with customers, it is important to note that the APS4A does not anticipate the altitude capture point, it simply engages the autopilot’s ALT HOLD mode when the altitude alerter output is triggered.

The EFD1000 PFD – APS4A to Bendix/King KFC200 interface is approved by Aspen’s AML-STC, the details of the KFC200 integration are outlined in Appendix G of the EFD1000/500 Installation Manual. Other autopilots are also compatible with the APS4A but, interfaces with other autopilots or EFIS requires separate approval. A complete list of compatible autopilots is shown in the attached APS4A technical data sheet and installation manual.

When combined with a compatible PFD the APS4A meets the functional requirements required by TSO- C9 and TSOC-52b.  For more information contact me:



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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