Quote:
| Nevertheless, this would be an extremely rare event, and to happen at such a critical moment of the flight is not something one would expect the certification to take into account |
TR deploy on take-off is considered during cert, however not from a controllability point of view, but within the context of the aircraft functional hazard analysis.
In aircraft I've seen, TR deploy on take-off is considered a catastrophic event, therefore effort is made through system reliability and redundancy to ensure the probability of it happening is better than 10-9.