An aircraft maintenance contract sets the commercial terms for the work. It covers who performs the work, what is included, how records and parts are handled, and who bears the cost when something goes wrong. The FAA does not publish a standard form for that agreement. Operators, aircraft owners, and repair stations still have to align the contract with the rules that apply. Those rules cover the aircraft and the people who approve it for return to service. A short work order can leave those points open, and an open point is often where a later dispute starts.
This guide is written for operators, owners, and Part 145 repair stations that already have a real maintenance relationship to document. It is not a fill-in template. Aero Law Center focuses on aviation-specific legal matters and assists clients across the United States with federal aviation matters and aircraft transactions. Any state-law component is evaluated separately based on the facts, jurisdiction, and applicable professional-admission requirements.
What an Aircraft Maintenance Contract Should Cover
The agreement should identify the parties, the aircraft or articles, and the kind of work the parties expect. Common arrangements include a one-time repair, a scheduled inspection program, line maintenance, component overhaul, and a longer support agreement. Each arrangement can use a master agreement plus individual work orders, or a single statement of work. Either structure can work if the documents say which one controls when they conflict.
Parties should also say who may authorize work. A pilot, a director of maintenance, a leasing company, and an owner can have different authority. If the contract does not name the people who can approve extra work, the gap shows up later. A shop may perform tasks the customer disputes. A customer may also expect work the shop never agreed to start.
Useful scope language usually addresses:
- The aircraft, engines, propellers, or components covered, including serial numbers where practical.
- Included services, such as inspection, repair, alteration, troubleshooting, or on-call support.
- Excluded services, such as interior work, engine shop visits, or items that need a separate quote.
- Where the work will be performed and who arranges ferry or positioning flights.
- How a written work order, quote, or change order becomes part of the contract.
Regulatory status belongs in the commercial description, not only in a compliance recital. Under 14 CFR 145.201, a Part 145 repair station may perform maintenance, preventive maintenance, or alterations in accordance with 14 CFR Part 43. That authority covers an article for which the repair station is rated, within its operations specifications. A contract that asks a shop to perform work outside its ratings creates both a performance problem and a compliance problem. The same is true when the shop lacks the data, equipment, or facilities the work requires.
Scope, Work Orders, and Performance Standards
Broad language such as “all maintenance required to keep the aircraft airworthy” is hard to price and hard to enforce. Airworthiness depends on the aircraft, its operating rules, and the work actually performed. A better contract describes the inspection or repair by reference to a known standard. That standard may be the manufacturer’s instructions, an approved program, or a written squawk list. The contract should also state what happens when the shop finds additional discrepancies.
Performance standards should stay tied to the work. 14 CFR 43.13 requires each person performing maintenance, alteration, or preventive maintenance to use specified methods. Those methods are the current manufacturer’s maintenance manual, the Instructions for Continued Airworthiness, or other methods acceptable to the FAA. The person must also use the tools and equipment needed to complete the work. A contract can require the shop to follow that applicable data. It should not promise that the aircraft will be free of every defect, or that a future inspection will find nothing else.
Turnaround dates are commercial terms. Parties can set a target completion date and a definition of when the clock starts. They can also set a process for delays caused by parts, hidden damage, or customer approvals. A date that ignores those variables often becomes a dispute rather than a schedule. If late delivery has a remedy, the contract should say what it is. Examples include a credit or a right to move the work. The contract should also say whether that remedy is the customer’s only contractual remedy for delay.
Change control matters as much as the original scope. A practical clause requires written approval, or a named dollar threshold, before the shop starts additional work. It should also say how the shop documents a discrepancy the customer declines, because a declined item can matter to later maintenance and to the parties’ risk allocation.
Records, Return to Service, and Parts
Maintenance paperwork is part of the deliverable. 14 CFR 43.9 generally requires a maintenance record entry with a description of the work and the date of completion. The entry names the person performing the work when required. It also includes the signature, certificate number, and kind of certificate of the person approving the work. The signature is the approval for return to service only for the work performed. The contract can require those entries, copies of work orders, and the data references the shop used. It can also set when the customer receives them.
Part 145 recordkeeping is separate from the aircraft record. 14 CFR 145.219 requires a certificated repair station to keep records in English for at least two years after the article is approved for return to service. Those records must show who performed the work, who inspected it when an inspector is required, and the maintenance release.
A customer copy of the work package does not replace that duty. The repair station’s file also does not replace the records the operator must keep under its own operating rules. The agreement should say which copies each party keeps and how long the shop will make its customer file available.
Parts clauses should cover at least these points:
- Whether parts must be new, serviceable, or owner-supplied.
- Who confirms trace and documentation for a part before it is installed.
- Who owns removed parts, and when a core or exchange unit must be returned.
- How life-limited parts and serialized components are identified in the invoice and the record.
- What happens if a part is later found unairworthy or undocumented.
A low price that depends on an undocumented part can cost more than the savings. The aircraft may not be returnable to service, or the operator may have to replace the part again. The contract should let either party stop installation of a part that lacks the documentation the work requires.
Contract Maintenance and Subcontracted Work
Many repair stations send some functions to another facility. That is lawful only within the limits in 14 CFR 145.217. A certificated repair station may contract a maintenance function to an outside source in two cases. The FAA must approve the function to be contracted. The repair station must also keep, for its responsible Flight Standards office, a list of the functions and the name and certificate information of each outside facility.
If the outside source is not certificated, extra conditions apply. The noncertificated person must follow a quality system equivalent to the repair station’s system. The repair station must remain directly in charge of the work. It must also verify by test or inspection that the work was performed satisfactorily and that the article is airworthy before approving it for return to service.
The same regulation limits one practice. A certificated repair station may not provide only the approval for return to service of a complete type-certificated product after contract maintenance, preventive maintenance, or alterations. A customer contract should not ask a shop to do that. It also should not assume the customer can choose any vendor the shop will then sign off.
Commercial language can still give the customer visibility. Parties may require notice before a major component leaves the facility. They may also require the vendor’s name and copies of the records the customer needs for its own files. Those commercial rights do not move regulatory responsibility. The repair station that approves the article for return to service remains responsible for meeting the rule that applies to that approval.
Operators that arrange maintenance directly with several shops should use the same clarity in each agreement. If one vendor is only supplying a part and another is performing the installation, the contracts should say who approves the completed work. Split responsibility that is not written down is difficult to reconstruct after an incident or an invoice dispute.
Price, Insurance, Indemnity, and Termination
Price terms should state whether the job is quoted as a fixed price, time and materials, or a mix. They should also identify the rates and the treatment of freight and shop supplies. The same clause should cover invoice timing and the documents that support a charge. A clause that allows “reasonable” additional charges without a change order invites a dispute. So does a clause that lets a customer withhold the entire invoice because one line is questioned. A practical compromise is to require timely payment of undisputed amounts and a short written notice of any disputed line.
|
Contract point |
What to define |
Why it matters |
|---|---|---|
|
Pricing |
Fixed price, time and materials, or a stated mix, plus change-order approval. |
Prevents open-ended charges and unpaid extra work. |
|
Parts |
New, serviceable, or customer-supplied, with trace and core terms. |
Connects the invoice to the maintenance record. |
|
Insurance |
Who carries hangarkeepers, liability, and property coverage, and the limit. |
Allocates loss while the aircraft is in the shop’s custody. |
|
Indemnity |
Which claims each party covers, including each party’s own negligence. |
A broad one-way clause can shift risk the price did not include. |
|
Termination |
Notice, payment for work performed, and delivery of records. |
Lets either party exit without abandoning the aircraft file. |
Insurance and indemnity need to match. If the shop has custody of the aircraft, the contract can identify hangarkeepers or equivalent property coverage, aviation liability coverage, and any additional-insured requirement. Some indemnity clauses shift the other party’s sole negligence or a consequential loss such as loss of use. Those clauses should be read against the insurance that is actually available. State law may limit how far an indemnity can go. Those limits vary, so the clause should be reviewed for the governing law the contract selects.
Warranty language should stay narrow and factual. A shop can stand behind its workmanship for a stated period. A promise that an engine, a repair, or a maintenance program will prevent a later failure is a different statement. It is usually broader than the shop can control. Consequential damages, including charter substitutes and lost revenue, should be addressed expressly if the parties intend to waive or cap them.
Termination terms should cover convenience, cause, and the notice period. They should also cover payment for parts already purchased and the customer’s right to work papers for work already performed. A repair station still has to complete any record the regulations require for work it approved. Ending the commercial relationship does not erase that duty.
Dispute terms are ordinary contract provisions, not a prediction of the outcome. Parties can choose negotiation first, then a forum, and they can say whether the prevailing party recovers fees. The forum should be workable for both sides. A clause that is hard to enforce can add cost without resolving the maintenance question.
How Counsel Can Help Before Work Starts
Legal review is most useful before the aircraft arrives and before a disagreement has a deadline. A focused review usually follows this order:
- Compare the master agreement with the current work order and confirm which document controls.
- Check subcontracting language against the repair station’s certificate limits.
- Compare indemnity and insurance terms with the price and the available coverage.
- For an operator, test the contract against the operating rules that govern the aircraft.
- For a repair station, flag customer paperwork that adds liability or record duties the shop did not price.
The AeroShield® Legal Plan is designed specifically for FAA Part 145 repair stations. If you operate an FBO, a Part 135 charter company, or another aviation business, contact Aero Law Center to ask whether AeroShield is available and appropriate for your organization. Eligibility, scope, and plan terms must be confirmed directly with Aero Law Center before enrollment. The firm explains the applicable rules in its guide to regulations that affect aircraft maintenance. It also summarizes record and performance duties in its overview of 14 CFR Part 43 maintenance compliance. Repair stations comparing certificate duties with customer paperwork can also review Part 145 certification requirements.
From aircraft transactions to aviation disputes and FAA compliance, Aero Law Center works with aviation businesses on the legal issues specific to their operations. Have questions about your situation? Contact Aero Law Center to schedule a consultation.
Speak With an Aviation Attorney or call (954) 869-8950.
Frequently Asked Questions
Does the FAA require a specific aircraft maintenance contract form?
No. The FAA regulations cited in this article govern who may perform work, how contracted functions are controlled, and what records must be kept. They do not supply the price, indemnity, insurance, or termination terms. Those points belong in the parties’ agreement.
Can a Part 145 repair station subcontract maintenance?
It may, within 14 CFR 145.217. The function must be one the FAA has approved for contracting. The repair station must keep the required list of outside facilities. A noncertificated vendor must be controlled and verified as that section describes. The customer contract should not treat subcontracting as unlimited.
Who has to make the maintenance record entry?
14 CFR 43.9 places the entry duty on the person who maintains, rebuilds, or alters the article, with stated exceptions. A Part 145 repair station also has its own two-year record duty under 14 CFR 145.219. The contract can require copies and delivery timing, but it cannot assign away a duty the regulation places on a person.
Should the contract guarantee that the aircraft is airworthy?
A promise that broad is a poor fit for maintenance work. Approval for return to service covers the work performed in accordance with the applicable data. The contract can require that standard. It should not guarantee that no other discrepancy exists or that the aircraft will remain free of later failures.
What if the parties disagree about an invoice or a repair?
The written change-order, warranty, and dispute clauses decide most of that fight. A customer with a repair dispute may also want to understand the separate litigation issues discussed on Aero Law Center’s aircraft repair shop dispute page. Contract review before the work is different from a lawsuit after it.
This article is provided by Aero Law Center for general informational and educational purposes only and does not constitute legal advice. The information provided may not reflect the most current legal or regulatory developments and should not be relied upon as a substitute for advice from a qualified attorney regarding your specific circumstances. Laws, regulations, FAA guidance, policies, and their application may vary depending on the facts and may change over time. Reading this article, visiting this website, submitting information to Aero Law Center, or communicating with Aero Law Center, its attorneys, employees, or staff does not by itself create an attorney-client relationship. An attorney-client relationship is established only through a written engagement agreement accepted by Aero Law Center. Before relying on the firm to represent you, obtain confirmation that the firm has agreed to the representation and its scope. Do not send confidential or sensitive information unless and until an attorney-client relationship has been established and you have been instructed to do so. Any results, outcomes, examples, or matters discussed are not a guarantee of similar results in any future matter.
