False Green signals - caused by 'TC Green' wires? (Nov 2000 Trains) - Trains Magazine

At least "Two signals with possibly faulty wiring" were located on the line from Tampa to Miami.

This apparently was the result of an "inspection" by CSX, not an "investigation", in response to the original incident. 

Refer to the following articles at the "HighBeam Research" subscription service ("pay-for-access", which I haven't yet):

  - "RR SIGNALS WITH POSSIBLY BAD WIRING FOUND IN FLA." by Chuck McGinness, Staff Writer of The Plam Beach Post, datelined August 18, 2000; and,

 and  - "CSX Signal Failure in Va. Could Have Caused a Crash; Fredericksburg Incident Prompts Wiring Check" by Don Phillips of the Washoington Post, datedlined August 17, 2000.

Note that this second article uses the term 'rare "false-proceed" indication' similar to the text of your message - "false proceed (green)", but your heading is "False Green", and Railway Man (above) used "false-clear".  I found these articles using the "Advanced Archive Search" of Google News, and venture to say that you might find more references by searching with various combinations of these terms and the other data in my response to Railway Man's comment below.

Railway Man - Both articles states that the incident occurred on August 8, 2000 at the Fredericksburg, Virginia station on CSX and involved a CSX Transportation, Inc. freight train, a northbound Virginia Railway Express (VRE) commuter train, and a northbound Amtrak Auto Train.  Perhaps these additional details will help you find a report or notice of this incident in the FRA database that you mentioned above.

Hope this is helpful.

- Paul North.

"This Fascinating Railroad Business" (title of 1943 book by Robert Selph Henry of the AAR)