The mental model

Aviation insurance is small but specialized. The total annual global premium is meaningful but a fraction of property or casualty totals. The number of policies is small. The size of any individual exposure is enormous. A single passenger jet loss can run into the hundreds of millions in hull and tens of billions in liability if the loss involves a high-passenger-count aircraft.

Aviation does not behave like other lines. The combination of severity (single events that exhaust whole towers) and frequency (few enough events that a single bad year can dominate decades of returns) makes the underwriting subjective and relationship-driven. Most large aviation programs renew with the same lead market for years or decades. The market has its own bespoke wordings (the AVN series, originating from the London Aviation Underwriters Committee), its own claims handling culture, and its own crisis-response playbook for the worst losses. New entrants struggle. Long-time participants ride out the cycles.

Airline coverage

Commercial airlines carry the largest aviation exposures and represent the bulk of premium in the line. A typical major airline program has hull, hull war, liability, and contingent business interruption components, with limits running into the billions.

Major airline coverages

• Hull all risks. Physical damage to the aircraft. Total loss, partial loss, ground risks, in-flight risks. Standard exclusions for war and similar perils.
• Hull war risks. Buy-back of the war exclusion. Includes hijacking, sabotage, and similar political perils. Typically placed with specialty war markets.
• Aviation liability. Passenger liability, third-party liability, baggage, mail, cargo. Combined single limits typically run from $750M to $2.5B+ for major airlines.
• Spares and equipment. Aircraft engines and parts, especially while in transit or in storage outside the aircraft.
• Contingent BI / loss of use. Lost revenue from grounded aircraft. Optional and increasingly relevant after groundings like the 737 MAX.

Fleet vs scheduled

Major airline fleets are insured on a fleet basis with all aircraft covered under a single program. Smaller operators and specialty fleets often use scheduled coverage with each aircraft listed individually. The fleet basis is administratively cleaner and reflects how major airlines actually operate.

General aviation

Everything that is not commercial airline. Private aircraft, business jets, helicopters, flight schools, charter operations, agricultural aviation, air ambulances. A different market with different forms.

Major segments

• Business and corporate aviation. Privately-owned business jets and turboprops. Large insured values, sophisticated owners, often professionally managed.
• Private piston aviation. Single-engine and light twin private aircraft. Smaller values, often owner-flown.
• Rotorcraft. Helicopters across commercial, private, and specialty (medevac, agricultural, offshore support) uses.
• Flight schools and training. Often higher loss frequency given student pilot exposure. Specialty markets.
• Charter and on-demand. Part 135 operations under FAA classification. Higher hours, higher exposure than private use.
• Agricultural aviation. Crop dusting and aerial application. Low altitude, distinctive risk profile.

Pilot underwriting

For private and business aviation, pilot qualifications drive a meaningful share of the underwriting decision. Total flight hours, hours in type, recent flight activity, certifications, age, and accident history are all rated. Some carriers offer training credits to incentivize ongoing pilot development.

Aviation manufacturers

Aircraft manufacturers face the most concentrated product liability exposure in any industry. A defective design or part can be implicated in a fatal accident decades after the aircraft was sold. Aviation product liability is its own market segment.

What manufacturers insure

• Aircraft products liability. Liability for losses caused by aircraft, engines, or components after delivery. Covers airframe manufacturers, engine makers, avionics, and components.
• Premises liability. Operations at the manufacturer's facilities.
• Hull on factory and test fleet. Aircraft owned by the manufacturer for testing or demonstration.
• Grounding coverage. The unique exposure where a fleet of aircraft is grounded due to a discovered defect, with losses claimed by airline operators (see next section).

The exposure profile

Aviation product losses can take decades to surface and trillions of flight hours to manifest. The underwriting requires deep technical evaluation of design, certification, and quality control programs. Capacity is concentrated; few markets have meaningful aviation product appetite. The 737 MAX MCAS losses and similar major events drive the cycle.

Products and grounding

Aviation products and grounding are coverages unique to the aviation manufacturer market.

Products coverage

Standard products liability for aircraft and component manufacturers. Responds when a manufactured aircraft or component causes an accident or injury after leaving the manufacturer. Long-tail coverage with claims surfacing many years after the original sale.

Grounding coverage

When a regulator or the manufacturer itself orders a fleet to stop flying because of a discovered defect, operators of those aircraft incur major economic losses (lost revenue, alternative aircraft costs, refunds). Grounding coverage responds to those losses for the manufacturer's benefit, since operators may seek recovery from the manufacturer.

Recent major groundings include the 737 MAX (worldwide grounding in March 2019 following the Lion Air and Ethiopian Airlines accidents) and various engine-related groundings. The 737 MAX grounding cost manufacturers, operators, and the supply chain billions of dollars and produced one of the largest aviation insurance loss events of recent decades.

Why this is its own coverage

Standard product liability would not respond to grounding losses because the grounding itself does not fall within bodily injury or property damage. The grounding is an operational and financial event. Specialty grounding coverage was developed precisely to address this gap, recognizing that the manufacturer's exposure to a grounding can dwarf its exposure to any single accident.

Airports and ground operators

Airports, fixed-base operators (FBOs), ground handlers, and other airside service providers have their own aviation exposures.

Airport liability

Premises liability for the airport itself, plus aviation-specific exposures: aircraft damage during ground handling, runway incursions, ATC-related incidents (where airport-owned), passenger injuries airside. Major hub airports carry massive limits given the concentration of aircraft and passengers on premises.

FBO and ground handlers

Fixed-base operators provide fueling, maintenance, hangar, and ground services to general aviation. Ground handlers provide similar services to airlines. Both face hangarkeepers liability (damage to aircraft in their care, custody, and control) plus standard aviation premises liability and pollution exposures.

Hangarkeepers

Hangarkeepers liability is the aviation equivalent of bailee's coverage in inland marine. The FBO or service operator takes care, custody, and control of customer aircraft. If the aircraft is damaged while in their care, hangarkeepers responds. Limits typically run $1M-$25M depending on the size and value of aircraft at the location.

War, hijacking, and AVN 52

War, hijacking, and certain political perils are excluded from standard aviation policies and bought back through specialty war markets.

The AVN 48 and 52 framework

AVN 48B is the standard war exclusion for aviation hull policies. AVN 52E is the standard war hull policy that buys back the excluded perils. The combination is how the market segregates war risk from standard hull. Liability war coverage uses analogous wordings.

What is excluded and bought back

• War and warlike operations
• Strikes, riots, civil commotion (often a separate sub-class)
• Hijacking and unlawful seizure
• Sabotage and similar deliberate acts
• Confiscation and detention by government authority
• Acts of terrorism (the line between terrorism and war is contested)

The 9/11 effect

The September 11, 2001 attacks fundamentally reshaped the aviation war market. Existing war coverages were canceled with seven days notice (a standard provision in war policies). Limits were drastically reduced. Premium increased multiples. The market response since 9/11 has been more segmented and more carefully underwritten, with aggregate limit management central to the war book.

The aviation market

Highly concentrated. A handful of markets globally writes the bulk of aviation business.

Major aviation markets

• Lloyd's of London. The historic and current center of aviation insurance. Major aviation syndicates dominate global capacity.
• The London Company Market. AIG, Allianz, Munich Re, and others maintain London-based aviation operations.
• US aviation specialists. Global Aerospace (a syndicate-style consortium), Starr Aviation, AIG Aviation, USAIG (United States Aviation Underwriters). Strong in US general aviation and as participants on US airline business.
• Continental European markets. Allianz, AGCS, Munich Re, Swiss Re hold meaningful aviation books.
• Asian and Middle Eastern markets. Some growing capacity in Singapore, Hong Kong, Tokyo, and Dubai for regional airline business.

Distribution

Aviation business is placed through specialty aviation brokers. Major firms (Aon Aviation, Marsh JLT Aerospace, Gallagher Aerospace, WTW Aerospace) dominate large airline placements. Specialty general aviation brokers handle smaller fleet and private aircraft business. The broker chain often involves a Lloyd's broker for the London piece of any large placement.

Where IDP earns its keep

Aviation submissions are document-heavy with fleet schedules, pilot logs, route data, maintenance records, and bespoke wordings.

Indico use cases

• Fleet schedule extraction. Pull aircraft type, registration, hull value, and operational use from operator-provided fleet schedules.
• Pilot data ingestion. For business and general aviation, normalize pilot qualifications, hours, and certifications from heterogeneous formats.
• Route data analysis. Map operator route networks against war zone listings (JWC and similar) to identify war exposure triggers.
• Wording comparison. Track AVN endorsement application year over year, surface changes between expiring and renewal terms.
• Loss run normalization. Convert aviation loss data (often FAA, NTSB, or insurer extracts) into a consistent claim history format.