Based on this case: B) Recent part replaced, rough diversion. Soon after a maintenance visit that swapped a critical rotor part, the aircraft feels rough. The pilot diverts and lands hard; minor property damage, no injuries, please analyze it using the legal ideas.

What to cover:

1. Primary theory:Is this mainlyoperator negligence(duty of care, vicarious liability, etc.) orproduct liability(design,manufacturing, orfailure-to-warn, including software/OTA as part of the product)?
2. Causation + one defense:Give a short "how A leads to B" causation path, plus one plausible defense (e.g., regulatory compliance, comparative fault, misuse, warnings).
3. Evidence to preserve: Think flight/telemetry, maintenance/training records, software/update logs, comms, photos/physical parts.
4. Risk transfer:Whichinsurance bucketis most likely to respond first (Operator; Manufacturer; Vertiport/Services; People & Proof) andwhydoes that bucket fit the facts? If you think agreements between companies might shift who pays, please note that.
5. If cross-border:One line on theMontreal Convention(automatic payout floor; fault above the limit; venue/time rules).