By Daniel Kane, Everette Aviation LLC
Introduction
After an aircraft accident, once everyone is safe and the NTSB questions are answered, the file lands on an adjuster’s desk and becomes, at bottom, a valuation problem: is this aircraft worth fixing? The insurer will pay to repair the aircraft or pay the hull value and take the wreck — and the decision between those two paths, the constructive total loss determination, is one of the most consequential valuation exercises in aviation insurance. It routinely involves seven-figure swings, it is made under time pressure with incomplete information, and both the owner and the insurer have money riding on which way it goes.
Owners are often surprised to learn how the decision actually works — that it is not a judgment about whether the aircraft can be repaired (almost anything can), that the salvage value of their broken aircraft is a central variable, and that the repair-versus-total math can come out differently for two identical aircraft depending on nothing more than what each was insured for. This article walks through the mechanics, the variables, and the places where an independent appraiser changes the outcome.
The Basic Framework
Aviation hull coverage is overwhelmingly written on an agreed value basis: the policy states a dollar figure for the hull, and in a total loss the insurer pays that figure — not the market value at the time of loss, not replacement cost. That single feature drives everything that follows.
When damage occurs, the insurer faces a choice with two branches:
- Repair: pay the cost to repair the aircraft to its pre-loss condition (plus, depending on policy and jurisdiction, related costs and any covered diminution), and the owner keeps the repaired aircraft.
- Total the aircraft: pay the agreed value, take title to the salvage, and sell the wreck to recover what it can.
The insurer’s economic comparison is therefore not simply “repair cost versus hull value.” It is:
Repair cost versus agreed value minus salvage recovery
An aircraft insured for $3 million whose wreck will bring $900,000 in the salvage market costs the insurer a net $2.1 million to total. If the repair estimate is $1.6 million, the insurer repairs. If the estimate is $2.4 million, the insurer totals it — even though $2.4 million is well below the $3 million hull value. This is the arithmetic behind the industry rules of thumb that aircraft are frequently totaled when repair estimates reach somewhere around 60–80% of insured value: the salvage recovery closes the gap. Where a given aircraft actually falls in that range depends on the variables below — which is why the rules of thumb are starting points for reserve-setting, not decision criteria.
The Variables That Actually Decide It
The repair estimate — and its error bars. Aircraft repair estimates are probabilistic documents. Sudden stoppages mandate engine teardowns whose findings aren’t known until the case is open; structural damage has a way of propagating beyond the initial survey; parts availability and shop backlog turn calendar time into cost. A competent adjuster prices not just the estimate but the risk that the estimate grows — because once the insurer commits to the repair path, cost overruns are largely the insurer’s problem. On out-of-production types where parts must be fabricated or sourced from the same salvage market the insurer would otherwise be selling into, the overrun risk alone can tip the decision.
Salvage value — the underappreciated variable. The wreck is worth real money, and how much is a genuine appraisal question. Helicopter salvage in particular often surprises: because so much of a helicopter’s value lives in components with their own lives and paper — engines, gearboxes, rotor systems, dynamic components — a helicopter with severe airframe damage can retain a striking share of its pre-loss value if the component clocks are favorable and the records are clean. A medium twin with fresh components and a destroyed cabin section may be worth more parted out than some intact examples of tired sisterships. Fixed-wing salvage runs on the same logic (engines, avionics) but typically at lower retention. Every dollar of salvage value makes totaling cheaper for the insurer, so the salvage appraisal pushes directly on the repair/total threshold.
The agreed value itself. Here is the feature of the system that owners least expect: the repair/total decision depends on what the aircraft was insured for, not what it is worth. Two identical aircraft with identical damage can go down different paths purely because one was insured at $2.5 million and the other at $3.5 million. The underinsured aircraft gets totaled (repair cost quickly overtakes the low hull value) and its owner receives a payout that won’t replace the aircraft in the current market. The overinsured aircraft gets repaired (the high hull value makes totaling expensive) and its owner gets back a repaired, damage-history aircraft when they might have preferred the check. Stale hull values don’t just misprice premium — they distort the claim outcome itself. This is the strongest practical argument for revisiting agreed values regularly, especially after the kind of market appreciation several helicopter and business aircraft segments have experienced.
Diminution of value. A repaired aircraft carries damage history forever, and damage history is a market discount — the aircraft is worth less than an undamaged twin even when the repair is flawless. Whether and how that diminution enters the insurer’s math depends on policy language and jurisdiction, but it belongs in the owner’s math regardless: an owner comparing “repaired aircraft” to “hull check” needs to compare the check against the aircraft’s post-repair value, not its pre-loss value. Quantifying that difference — the market’s actual discount for this kind of damage on this type — is appraisal work, and it is often the number that determines whether the owner should be fighting for repair or fighting for the total.
Where the Fights Happen
Most claims resolve cooperatively. The contested ones tend to cluster in predictable places:
- The owner wants it totaled; the insurer wants to repair. Common when the aircraft has appreciated past its agreed value, or when the owner (rationally) dreads owning a major-damage-history aircraft. The owner’s leverage is evidence: a credible repair-cost critique, a diminution analysis, documentation of consequential and latent damage risk.
- The owner wants it repaired; the insurer wants to total. Common with sentimental aircraft, rare types, or heavily customized machines where the agreed value never captured the owner’s invested cost. The salvage buy-back — the owner purchasing the wreck back from the insurer and funding the repair privately — is the standard escape valve, and pricing that buy-back is itself a salvage appraisal question.
- The numbers themselves are disputed. Repair estimates from competing shops diverge; the insurer’s salvage bids come in far from the owner’s expectations; the parties disagree about post-repair value. Many aviation policies contain an appraisal clause for exactly this situation — each side appoints an independent appraiser, the appraisers select an umpire, and the resulting determination binds the parties. When that clause is invoked, the quality and defensibility of each side’s appraisal work stops being background and becomes the whole contest.
In each of these, the party with the better-documented valuation position tends to win — not because adjusters are adversaries, but because claim files run on support, and an unsupported number loses to a supported one.
What This Means Before You Ever Have a Claim
The constructive total loss framework rewards owners who did their valuation homework in advance:
- Keep the agreed value current. An annual check of hull value against the market — especially after major maintenance events that added value, or market moves that repriced the fleet — is cheap insurance on the insurance. The appraisal that supports it also becomes the pre-loss value benchmark if a claim ever comes.
- Insure the equipment where the value is. On mission-configured helicopters, confirm the hull value actually encompasses the hoist, the interior, the sensors — or that they are scheduled separately. A total loss that pays airframe value on an aircraft whose worth was half mission equipment is a bad day compounded.
- Know your type’s salvage market. Owners of component-rich helicopters and parts-hungry legacy types should understand that their salvage values run high — which means their aircraft total “earlier” (at lower repair percentages) than intuition suggests.
Conclusion
The repair-or-total decision is not a mechanical threshold; it is a three-variable valuation problem — repair cost with its overrun risk, salvage value with its component-driven surprises, and an agreed value that was fixed on a renewal date months or years before anyone knew it would matter. Each variable is an appraisal question, and the outcome moves seven figures on the answers. Owners encounter this math for the first time at the worst possible moment: after the accident, on the insurer’s timeline. The better position is to understand it before — with a current agreed value, correctly scheduled equipment, and a documented pre-loss valuation on file.
Everette Aviation provides USPAP-compliant appraisals across the full insurance lifecycle: agreed value support at binding and renewal, pre-loss value and diminution analyses, salvage valuations, and independent appraisal work under policy appraisal clauses — for owners, insurers, and counsel.
Everette Aviation LLC provides certified, USPAP-compliant aircraft and helicopter appraisals nationwide. Daniel Kane is an ASA Accredited Senior Appraiser and FAA-certificated A&P mechanic with Inspection Authorization. Contact us at everetteaviation.com to discuss your appraisal needs.