Aviation damage claims: assessing a loss to an aircraft

What an aviation hull policy responds to

Aircraft hull insurance generally covers accidental physical damage to the airframe, engines and installed equipment, often split into flight risks and ground risks, with separate conditions when the aircraft is moving on the ground or stationary. Policies for light aircraft, business jets and commercial fleets differ widely in their deductibles, agreed values and exclusions.

Most wordings exclude wear and tear, mechanical breakdown and gradual deterioration, so an engine failure without external cause may not be covered unless it leads to other accidental damage. Pilot warranties, approved use and geographical limits are also frequently checked after a loss.

Notification conditions are often strict. The policy may require immediate notice of any accident or damage, cooperation with the underwriters' surveyor and their consent before repairs begin, other than urgent work needed to protect the aircraft. Owners should check these requirements as soon as possible after the event.

Agreed value and the total loss threshold

Many hull policies are written on an agreed value. If repair costs exceed a defined percentage of that value, or the aircraft cannot be economically repaired, the underwriter may declare a constructive total loss and take the salvage. Whether the threshold has been reached is a frequent source of negotiation.

The survey and repair approval process

After notification, the underwriter or lead insurer appoints an aviation surveyor or adjuster, usually a licensed engineer familiar with the type. They inspect the damage, review the technical records and agree the repair scope with an approved maintenance organisation. For larger aircraft, the manufacturer may need to design or approve a repair scheme outside the structural repair manual.

Separately, accidents and serious incidents may be investigated by the national safety body, such as the AAIB in the UK, the NTSB in the United States, the TSB in Canada or the ATSB in Australia. Those investigations aim at safety, not liability, and the insurance assessment runs in parallel.

• Photographs and video of damage before the aircraft is moved, where safe
• Airframe, engine and propeller logbooks and maintenance records
• Pilot licence, medical and type rating details for the flight
• Flight data, cockpit voice or engine monitoring downloads where available
• Repair estimates, parts quotations and manufacturer engineering dispositions
• Records of storage, ferry and transport costs

Costs that are easily overlooked

Beyond parts and labour, a hull claim may include non-destructive testing, special tooling, engineer travel, ferry flights, storage, recovery from the accident site and post-repair test flights. Whether each item falls within the policy depends on the wording, and some require prior agreement from the underwriter.

Loss of use, charter replacement and lost revenue are generally not part of the hull cover and would need a separate loss of use or business interruption extension.

Downtime, storage and return to service

Time is expensive for any aircraft owner. Parts for older types may be scarce, manufacturer engineering responses can take weeks and maintenance organisations have limited slots. A clear plan agreed early with the underwriter's surveyor, setting out the sequence of inspections, parts orders and approvals, reduces idle days.

Storage at an airfield, hangarage at the repair facility and protective measures for engines and avionics during a long repair are often part of the claim, but only if they are reasonable and documented. Owners should also confirm who pays for the post-repair inspection, the return-to-service paperwork and any ferry flight back to base, since these final steps are a common source of small but irritating disagreements at the end of a file.

Where owners and underwriters usually disagree

The most common disputes concern the extent of hidden damage after a hard landing or prop strike, the choice between repairing and replacing major components, the use of serviceable used parts versus new parts, and the treatment of engine overhaul time. Owners also argue about diminution in value, since a damage history can reduce resale price, although many policies exclude it.

Breach of warranty arguments, for example an unapproved pilot or flight outside the permitted use, can threaten the whole claim and call for careful legal and technical analysis.

Engine damage and life-limited parts

A sudden stoppage or foreign object damage may require a teardown inspection. The underwriter may deduct a proportion for the hours already used since the last overhaul, on the basis that a newly overhauled engine is betterment. How that deduction is calculated deserves close scrutiny.

Bringing in an expert for the owner

Owners and operators often rely on their broker, but complex or high-value losses can justify an independent aviation surveyor or loss assessor acting solely for the insured. Their role is to verify the repair scope, challenge depreciation and total loss calculations, check that all associated costs are claimed and keep downtime in view.

Such an expert should hold relevant engineering qualifications and experience on the type, and should explain clearly what is negotiable and what the policy simply does not cover. No specialist can guarantee a figure before teardown results are known.

Aviation losses combine strict airworthiness rules with technical valuation questions. Good records, early survey attendance and, where stakes are high, an expert acting for the owner help keep the claim fair and the aircraft moving.