GEC-Marconi / Plessey PRS-2026C Harrier GR5 DRU Part 2: Power up Testing and EEPROM Dump
Part 2 of my avionics teardown where I power up the PRS-2026C Data Retrieval unit which is part of the GEC-Marconi (formerly Plessey Avionics) ESD2020 system used for fault diagnosis and servicing of the Harrier GR5 and the AV8B aircraft. These are no longer used by the air force and a lot of the decommissioned equipment found its way onto eBay.
In this video I power up the device and try and see if there's anything interesting on the serial ports and if it could be repurposed. However without the keypad and display assembly I couldn't get anything useful. A viewer of part 1 also has one of these units but his is complete and he kindly sent some photos across of the unit working.
The final part of the video I dump the EEPROMs which stores the data downloaded from the aircraft. A tail number of a Harrier GR5 was found in the logs which appears to have been the last time this was used prior to decommissioning of the Harrier fleet.
Part 1 • Harrier GR5 Engine Diagnostic Computer (DR...
Blog article https://www.adrian-smith31.co.uk/blog...
Thanks to Neil Roberts for the images of the DRU screen and keypad assembly.