Lawyers evaluate settlement value by adding past and future medical bills and lost income, then adding pain and lost enjoyment, and evaluate trial risk by multiplying the likely award by the chance of winning. For a diversion that delays critical care, the link between the delay and a worse heart or stroke outcome controls both numbers. Settlement value means the dollars needed to resolve the claim now. Trial risk means the chance a jury awards less or nothing after cost and delay.
Official resources:
- Read the official guidance from Govinfo — Use this primary source to verify the official guidance.
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Table of Contents
- Who controls the diversion decision?
- How common and costly are diversions?
- How is settlement value calculated?
- How is trial risk discounted?
- What should passengers preserve before settlement talks?
Who controls the diversion decision?
The captain has final authority to divert for a medical emergency. Medscape reports the captain is advised by crew, any onboard volunteer clinician, and ground-based medical consultation on severity and risk if diversion is declined, in Medscape guidance on diversion authority. That chain shapes liability.
Lawyers ask what the crew knew, what the volunteer saw, what ground doctors advised, and when the captain chose to continue. A delayed turn toward care for chest pain, stroke signs, or seizures draws the closest review. Those events are the most diversion-prone.
How common and costly are diversions?
In-flight medical emergencies occur about once per 604 flights, with about 7.3% causing diversion and 0.3% fatal, according to Advisory Board reporting a New England Journal of Medicine study, in Advisory Board summary of the in-flight emergency study. Cardiac events, stroke, and seizures most often force a diversion. Cost does not set injury value, but it frames airline conduct.
IATA estimates each diversion costs $10,000 to $200,000. Plaintiff lawyers use that context to test reasonableness. A long refusal to divert for classic emergency signs looks worse than a close call with unclear symptoms.
How is settlement value calculated?
Lawyers start with economics: past bills, future care, lost wages, and lost earning capacity. They then add non-economics for pain, suffering, and loss of enjoyment, often estimated as a 1.5-5x multiplier of economics, with higher values for severe, permanent, and clearly caused harm, described in Wallace Pierce analysis of settlement factors. Severity and permanence matter most after delayed critical care.
A delay that turns a treatable heart attack or stroke into lasting heart damage, brain injury, disability, or death supports higher damages. Clear liability also raises value. A strong timeline showing late recognition, late equipment use, or late diversion supports a higher demand.
How is trial risk discounted?
Lawyers multiply the probable award by the estimated win probability, then subtract litigation friction. Mediate.com gives the standard example of 60% times $100,000 equals $60,000, then further discounts for disputed liability, causation, expert and delay costs, and insurance limits, in Mediate.com explanation of claim valuation. Causation is the main trial risk here.
The defense will argue the cardiac or stroke outcome would have been the same with faster care. Other discounts include equipment and volunteer issues, plus forum and treaty caps. For international carriage, the Montreal Convention imposes two-tier liability with strict carrier liability up to 128,821 Special Drawing Rights, about $175,000, and liability above that unless the carrier proves absence of negligence, reported by Hesketh Henry on ICAO limits, in Hesketh Henry report on ICAO liability limits.
What should passengers preserve before settlement talks?
Pure delay or distress without qualifying bodily injury generally fails under Article 17. FAA practice also does not routinely create a public record for non-diversion events, so personal records carry the case. Wait until maximum medical improvement when possible, so future care and permanence are known.
- Flight number, route, seat location, diversion point, and landing time
- Symptom onset time, crew alerts, announcements for medical help, and equipment used
- Treatment timeline from cabin to gate to hospital, plus tests and prognosis
- Bills, work loss, home-care needs, and daily limits on activity
- Names of crew, volunteers, seat neighbors, and treating doctors
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