Originally Posted by
safetypee
dixi, AFAIR the Trident accident was during a pre-delivery production test flight
Yes, as per the first post:
Originally Posted by
Tee Emm
The aircraft took-off from Hatfield at 1652 hours to carry out the first of a series of production test flights for the purpose of qualifying for a Series Certificate of Airworthiness. The schedule for the flight called for stalling tests should the aircraft and the flight conditions be suitable.
That's verbatim from the investigation report.