I have constructed a root cause based on what happened on approach up to the decision to go around. I am not bound by the discipline required of the TSB teams, but at the same time we know a lot can go wrong when we declare an emergency on short final and choose a go around with the runway a mile away.
“Pilot Error: After bird strikes (unknown number), while configured for landing on final approach with a stable approach, crew failed to continue the approach. FLYING the aircraft to the runway ….sans QRH / emergency procedures given the phase of flight. They were 500’ and 2 km from the runway threshold at 161 knots.
The decision to go around may have been influenced by a crew decision to prioritize the QRH checklist actions or to avoid another looming bird conflict.
That shows poor critical thinking, likely associated with lack of pilot conditioning in the sim to “FLY to the runway” if on final and configured to land after or during bird strikes.
Everything that happened after the decision to go around became “collateral” including the fatalities. Figuring out the collateral is going to be for the record. Consequences of a decision to fly away from a runway during an emergency.