SilsoeSid
In an earlier post you mention that the report does not comment on the condition of the lamp filaments prior to testing, so we can never know if they were illuminated.
Page 58 of the report states that the lamps illuminated correctly during testing, but that the audio warning did not sound. It was found that the unit was drawing excessive current and after several minutes a tantalum capacitor blew and became open circuit. The electrical current draw returned to normal and the unit then functioned correctly.
Only one previous failure of this component has been noted and tantalum capacitors are suspectible to extreme mechanical stress. On the balance of probability, this capacitor was damaged by extreme deceleration in the impact sequence.
So it is possible to say that the lights were working correctly before the accident but there is a faint chance that the audio warnings did not sound, although this is very unlikely.
You did comment that you were going out on a limb making that assertion.
