Choosing an aircraft arrangement is not simply a question of whether an operator needs an aircraft, a crew, or temporary capacity. The structure can affect who has operational control, which certificate and operating rules apply, and how maintenance, insurance, liability, and regulatory risk are allocated.
Schedule a consultation with Aero Law Center or call (954) 869-8950 before signing an aircraft lease.
The key dry lease vs wet lease aircraft legal differences are operational control and the services supplied with the aircraft: a dry lease generally provides the aircraft without crew. A wet lease supplies the aircraft and at least one crew member. ACMI arrangements typically package the aircraft, crew, maintenance, and insurance. The parties’ actual responsibilities and the full contract determine the legal and FAA analysis. FAA guidance treats operational control as a matter of legal responsibility.
For Part 135 operators, air carriers, aircraft owners, and other aviation businesses, labels alone do not resolve the analysis. Before signing, the parties should test the proposed arrangement against the facts of performance, certificate authority, and contract language. That review starts with what a dry lease actually transfers and what the lessee must control. An aircraft transaction attorney can help evaluate those issues alongside the commercial terms.
What Is a Dry Lease in Aviation and How Does It Work?
A dry lease generally separates the aircraft asset from the operation of the aircraft. The lessor provides possession of the aircraft under a lease, while the lessee assumes the operational responsibilities defined by the agreement and applicable regulations. The arrangement may support a Part 91 operation or another business structure, but the label alone does not determine the legal result.
Operational control is the central issue
For a lessee, the most important question is who has operational control: the legal responsibility for initiating, conducting, and terminating a flight. FAA guidance explains that operational control is a matter of legal responsibility, not the size of the aircraft or the number of aircraft in a fleet. The parties should therefore assign that responsibility clearly rather than relying on informal practices or a lease title.
In a typical dry-lease structure, the lessee must understand how crew arrangements fit within that allocation. The agreement should identify who selects, employs, contracts with, trains, and directs any crew used for the operation. If a management company assists with pilot procurement, training, scheduling, maintenance, fuel, or related services, those services should be documented without obscuring which party retains operational control. An FAA legal interpretation addressing these management functions illustrates why the details of the relationship matter.
Maintenance, airworthiness responsibilities, insurance, indemnity, and possession also require precise drafting. The lease should state who performs or arranges maintenance and who bears the associated costs. It should identify required insurance, when risk transfers, and how the aircraft is delivered, inspected, returned, or repossessed. Address records, defects, downtime, and compliance duties for the intended operation as well.
FAA guidance is designed to help lessees avoid agreements that fail to maintain operational control with the appropriate party. Before signing, aviation businesses should compare the written terms with the actual flow of money, personnel, scheduling, maintenance, and flight decisions. Aero Law Center’s Part 91 dry lease operational control resource provides additional context for that diligence.
What Is a Wet Lease and When Do Operators Use It?
A wet lease generally involves an aircraft supplied with at least one crew member by the lessor. That differs from a dry lease, where the aircraft is supplied without crew. This practical distinction is useful, but it does not by itself answer the legal or regulatory questions in a proposed arrangement. Operators and certificate holders must examine who controls the flight, provides the crew, directs scheduling, accepts responsibility for compliance, and holds the relevant authority.
When a wet lease may fit an operator’s needs
A wet lease can help an air carrier or charter operator add capacity without immediately sourcing and integrating every operational resource internally. For example, an operator may consider the structure when it needs aircraft and qualified crew for a defined period, seasonal demand, or a particular route or customer requirement. The commercial convenience does not eliminate the need to document the arrangement carefully.
Federal rules define an air carrier to include a person that undertakes air transportation directly by lease or another arrangement. The parties should not assume that the lessor’s involvement removes the lessee’s regulatory responsibilities. Federal guidance also states that wet leasing from an individual or entity not separately authorized to engage in common carriage can be contrary to federal aviation regulations. The authorization, certificate status, and actual roles of both parties require review before operations begin.
The agreement should address operational control in terms that match the parties’ conduct. FAA guidance treats operational control as a matter of legal responsibility. An FAA interpretation has considered how management services, pilot procurement, maintenance, training, and scheduling interact with a purported dry lease. Those factors can matter when evaluating whether a transaction functions as represented, regardless of the label placed on the document.
For operators comparing dry lease vs wet lease aircraft legal differences, the key question is not simply who supplies the aircraft or crew. It is whether the full arrangement, including side agreements and day-to-day practices, aligns with the applicable certificate, operating rules, and allocation of responsibility. Classification is fact-dependent, so counsel should review the complete structure before execution.
What Is an ACMI Lease, and How Is It Different?
An ACMI lease is a commercial arrangement in which one party supplies an aircraft, crew, maintenance, and insurance. The name comes from those four components: Aircraft, Crew, Maintenance, and Insurance. In practical terms, an ACMI arrangement can give an operator access to lift and operating support without requiring the operator to provide every resource itself.
Why ACMI Is Often Compared With a Wet Lease
Because the lessor generally provides the aircraft and crew, ACMI is often described as a form of wet-lease or wet-lease-like capacity. That shorthand can be useful, but it does not answer the legal questions that matter before signing. The agreement should identify who operates the aircraft, who exercises operational control, which party holds the applicable certificate, and how maintenance, insurance, scheduling, dispatch, and regulatory responsibilities are allocated.
The FAA treats operational control as a matter of legal responsibility, not aircraft size or fleet size. Its guidance is intended to help lessees avoid agreements in which operational control is not clearly maintained by the appropriate party. See FAA guidance on operational control and aircraft leasing.
That is why an ACMI label should not be treated as a complete legal classification. The contract, the parties’ certificate status, and their actual conduct can affect how the arrangement is evaluated. A package that looks like a capacity solution may still raise questions about commercial operations and common carriage, including whether the parties are performing the roles described in their documents.
The distinction from a dry lease is also practical. In a dry lease, the lessee typically provides its own crew and assumes the operating responsibilities assigned to it. In an ACMI arrangement, the supplied crew and bundled services may leave the lessor or another authorized operator responsible for significant operating functions. The allocation must be reviewed against the intended operation, applicable FAA rules, and the parties’ real-world practices. No universal conclusion follows from the word ACMI alone.
Key Dry Lease vs Wet Lease Aircraft Legal Differences
The commercial label is only the starting point. The agreement should show who has operational control, who supplies personnel and services, and who bears responsibility when an operation fails. Industry terminology generally treats a dry lease as an aircraft supplied without crew and a wet lease as an aircraft supplied with at least one crew member. FAA legal guidance describes these distinctions, but they do not determine the legal result by themselves.
At a glance: The table below summarizes typical responsibilities. The parties’ contract, certificate status, and actual conduct control the legal analysis.
| Issue | Dry lease | Wet lease | ACMI |
|---|---|---|---|
| Operational control | Usually rests with the lessee, subject to the full facts and agreement. | Often remains with the provider, but the parties’ actual conduct matters. | Commonly structured as provider-operated capacity, subject to regulatory and contractual review. |
| Crew and maintenance | Lessee generally arranges crew and assumes stated maintenance duties. | Provider supplies the aircraft and at least one crew member; responsibilities must be allocated precisely. | Provider packages aircraft, crew, maintenance, and insurance. |
| Payment and possession | Often a fixed lease payment with possession transferred to the lessee. | Payment may reflect aircraft and operating services, without the same possession model. | Payment commonly covers agreed capacity or hours, while possession and service scope remain contract questions. |
| Liability and risk | Lessee may carry substantial operational, insurance, and indemnity obligations. | Provider may retain operating responsibilities, but liability, delay, and indemnity terms require close review. | Risk is divided across the bundled services and must be matched to actual control and performance. |
Why the allocation matters
Operational control is a question of legal responsibility, not aircraft size or fleet size, according to FAA guidance. The agreement should therefore identify who directs flights, selects and controls crew, controls scheduling, handles maintenance decisions, and accepts regulatory responsibility. Payment terms, possession, insurance, and indemnities should support that allocation rather than contradict it.
A dry lease can still create risk when a management company supplies pilots, schedules flights, or performs other services in a way that blurs the lessee’s control. The FAA has addressed arrangements involving management, pilot procurement, maintenance, training, scheduling, and dry leasing, so those functions should be documented carefully. A wet lease or ACMI structure also requires diligence regarding the provider’s authority, the scope of services, and applicable operating rules.
Misclassification risk is serious. The FAA warns that devious leases and conditional sales contracts can disguise operations subject to Parts 121, 125, or 135. The parties should evaluate the substance of the arrangement, not rely on its title.
Question and answer
What is the main legal difference between a dry lease and a wet lease? A dry lease typically supplies the aircraft without crew, while a wet lease supplies the aircraft with at least one crew member. The controlling legal question is who bears operational control and related regulatory responsibility under the actual arrangement.
How Do Dry Lease vs Wet Lease Aircraft Legal Differences Affect FAA Review?
The FAA analysis does not end with the label in the contract. Regulators may examine who has operational control, who provides the crew, who makes scheduling and dispatch decisions, and whether the arrangement effectively provides air transportation. Those facts can affect whether Part 91, 121, 125, or 135 rules apply, and whether the parties hold the authority required for the operation.
Operational control, truth-in-leasing, and sham-lease risk
FAA Advisory Circular 91-37B describes operational control as a matter of legal responsibility, not aircraft size or fleet size. A lease should therefore identify the responsible party with precision and align the contract with actual conduct. A nominal dry lease may create risk if the lessor, management company, or another party continues to control crew selection, scheduling, dispatch, maintenance decisions, or other operational functions. The FAA has specifically warned that devious leases and conditional sales contracts can disguise operations subject to Parts 121, 125, and 135.
Truth-in-leasing documentation and related delivery requirements should be reviewed alongside the operating agreement, management agreement, and actual practices. An FAA legal interpretation also addresses arrangements involving maintenance, pilot procurement, training, fuel, scheduling, and catering while an aircraft is described as dry leased. The facts should be evaluated as a complete operating model, not in isolated contract clauses. See the FAA guidance in AC 91-37B and the FAA interpretation at FAA legal interpretation 13611.
For additional context, review Aero Law Center’s guide to FAA operator classification and compliance before assuming a proposed structure fits a particular operating rule.
Certificates, wet-lease authorization, and operations specifications
Part 1 defines an air carrier to include a person undertaking air transportation directly by lease or another arrangement. The practical question is therefore whether the transaction creates, supports, or masks an air-carrier or commercial-operator activity. A provider engaging in charter air service generally must hold the applicable FAA certificate, and the certificate holder’s operations specifications may control what aircraft, routes, services, and wet-lease arrangements are authorized.
Wet leasing deserves separate diligence. Federal Register wet-lease policy guidance states that an air carrier wet leasing an aircraft from an individual or entity not separately authorized to engage in common carriage is contrary to the Federal Aviation Regulations. The parties should confirm the lessor’s authority, the lessee’s certificate status, required approvals, and any applicable operations-specification provisions. Review 14 CFR Part 1, 14 CFR 119.53, the FAA material at FAA media 13716, and the Federal Register wet-lease policy guidance. Operators should also confirm their Part 135 certification requirements where applicable.
Schedule a consultation with Aero Law Center or call (954) 869-8950 before signing. The regulatory result is fact-dependent and should be confirmed by aviation counsel.
What an Aviation Attorney Reviews Before You Sign an Aircraft Lease
Before an operator signs, counsel should test whether the written deal matches the proposed operation. The FAA treats operational control as a question of legal responsibility, not aircraft size or fleet size. Its guidance is intended to help lessees avoid agreements that leave that responsibility unclear. The contract also must work under applicable state contract law, which can affect remedies, indemnities, payment disputes, and enforcement.
Pre-signing diligence for aviation operators
For Part 135 operators and air carriers, the review should address the following checkpoints:
- Parties and authority. Confirm each lessor, lessee, owner, manager, and affiliate is correctly identified, authorized to contract, and able to convey the stated rights. Check title, liens, corporate authority, and any required owner or lender consent.
- Operational control. State who has final authority and responsibility for initiating, conducting, and terminating each flight. Avoid language that assigns responsibility to one party while another party actually controls scheduling, dispatch, crew, or flight decisions.
- Crew and management separation. Identify who selects, employs, trains, supervises, and pays the crew. If a management company supplies pilots, scheduling, or other services, review whether the combined arrangement remains consistent with the intended operating rules.
- Maintenance and airworthiness. Allocate inspections, records, discrepancies, repairs, parts, return-to-service decisions, and continuing airworthiness duties. Confirm that responsibility is practical, not merely nominal.
- Insurance and indemnity. Match insurance requirements to the operation, name additional insured parties accurately, and define indemnity triggers, exclusions, defense obligations, and liability limits.
- Payment and possession. Specify rent, reserves, taxes, fees, delivery conditions, acceptance, aircraft use restrictions, and when possession and risk transfer.
- Governing law. Separate federal FAA compliance questions from state-law contract provisions. A choice-of-law clause does not replace required federal approvals or operating authority.
- Regulatory approvals. Confirm certificates, operations specifications, authorizations, registrations, and required notices before operations begin. The intended label cannot cure a structure that functions differently.
- Exit and default. Address maintenance defaults, grounding, late payment, repossession, termination, transition of passengers and records, casualty, insolvency, and post-termination cooperation.
Aircraft leasing is part of Aero Law Center’s aircraft transaction practice. Operators evaluating these issues can review the firm’s aircraft lease legal considerations resource, then obtain advice tailored to the aircraft, certificate status, counterparties, and proposed operation.
Frequently Asked Questions
What are the main legal differences between a dry lease, wet lease, and ACMI arrangement?
A dry lease generally provides the aircraft without a supplied crew, while a wet lease provides the aircraft with at least one crew member. ACMI usually packages the aircraft, crew, maintenance, and insurance, but the label does not decide the legal result. The full agreement, actual services, possession, and operational-control responsibilities must be reviewed together.
Who has operational control under a dry lease?
That depends on the agreement and the parties’ actual conduct. The lessee may assume operational control in a legitimate dry-lease structure, but management, scheduling, maintenance, pilot procurement, and related services can affect the analysis. FAA guidance treats operational control as a matter of legal responsibility, not fleet size, and warns lessees to assign it clearly. FAA Advisory Circular AC 91-37B
Does a wet lease automatically authorize commercial charter operations?
No. A wet lease does not replace the certificate or authorization required for the operation. The FAA states that legitimate charter air service requires an applicable Part 121, 125, or 135 certificate. While federal guidance addresses limits on wet leasing from an entity not separately authorized for common carriage. Federal Register wet-lease policy guidance
What should an operator verify before signing an ACMI agreement?
Confirm which party controls flights, supplies and supervises crew, performs or arranges maintenance, carries insurance, holds required certificates, and bears regulatory responsibility. Also review possession, payment, indemnities, records, operational specifications, default rights, and exit terms. An ACMI structure can solve a capacity need while still creating material compliance and contract exposure if those responsibilities are unclear.
Schedule a Consultation Before You Sign
Lease labels do not resolve every operational-control, FAA, or contract question. A focused review can help your team evaluate how the proposed dry lease, wet lease, or ACMI arrangement assigns responsibilities and manages regulatory exposure before execution. Schedule a consultation with Aero Law Center or call (954) 869-8950 to discuss the structure and issues specific to your operation. This article provides general information only and does not create an attorney-client relationship.
