Imagine that... an aircraft black box that doesn't timestamp:

'The NTSB says it will have to build a timeline for the data from the flight data recorder on the #blackhawk helicopter involved in last week's c̶o̶l̶l̶i̶s̶i̶o̶n̶ deadly crash in Washington because the data wasn't time stamped. The Board had hoped to get definitive answers on the discrepancy between the radar data and the FDR and ADS-B gear on the CRJ700'

#NTSB Delayed In Altitude Verification Of Collision Aircraft

https://www.avweb.com/aviation-news/ntsb-stalled-in-altitude-verification-of-collision-aircraft/