Find the revenue your airport is owed
Public audits of airport lease operations keep flagging the same leaks: tenants with no written lease, escalations never applied, expired agreements still occupied, receivables nobody chased. We run those same checks against your records and hand you the findings, free.
What public audits keep finding
Different states, different sized fields, the same findings. If auditors keep finding the same failures, those failures are predictable. Predictable failures are findable at your field too.
16 of 58
Tenants With No Written Lease
A Detroit auditor general review of Coleman A. Young International Airport found 16 of 58 tenants had no lease at all, and estimated the airport was forgoing more than $481,000 a year in potential revenue.
Detroit Office of the Auditor General, 2019
$3.9M
In Receivables, $1.3M Over a Year Old
San Antonio's city auditor found $3.9 million in aviation accounts receivable, with $1.3 million more than one year old. Required dunning letters were never sent and late fees required by the leases were never charged.
San Antonio Office of the City Auditor, AU08-010
$2.4M
Collected With No Written Leasing Policy
Cobb County International Airport collected $2.4 million over a 21-month review period with no written policy governing how leases get approved or renewed, and fuel flowage fees were never independently verified.
Cobb County Internal Audit, Report 2025-003
242
Contracts With Unverified Commission Revenue
DeKalb-Peachtree Airport's auditor found commission revenue across 242 contracts had never been independently verified, citing an ongoing risk of revenue loss.
DeKalb County Office of Independent Internal Audit, 2025
9 of 30
Leases Missing Current Insurance Certificates
Boise's internal auditor sampled 30 airport leases and found 9 without a current certificate of insurance on file, plus 7 of 10 hangars visited holding items inconsistent with their lease terms.
Boise Office of Internal Audit, #17-01
$40.9M
In Potential Revenue Diversions
The DOT Office of Inspector General sampled just five airport sponsors and found approximately $40.9 million in potential revenue diversions that FAA oversight had not detected.
DOT Office of Inspector General, AV-2003-030
Figures are auditor-identified potential or questioned amounts as stated in the cited public reports, not confirmed losses.
Incomplete records are not a blocker. They are the first finding.
Bring whatever you have: a rent roll last touched in 2019, lease PDFs, paper files, a tenant list from memory. The audit is built to produce findings from partial records, because the fields leaking the most revenue are never the ones with a tidy file cabinet. We check for:
Occupants with no lease on file
Your tenant or based-aircraft list has names that no lease record can back up. This was Detroit's single most damning finding.
Expired leases, still occupied
The end date passed years ago. The tenant stayed, the rate froze, and nobody renegotiated.
Escalations and rate drift
The lease has a CPI or fixed escalator that was never applied, or the rent roll says one number and the signed agreement says another. Every month the gap compounds.
Missing or expired insurance certificates
Certificates that were required and never collected, or that quietly expired with nobody watching.
Missing security deposits
The lease requires a deposit. The ledger shows nothing, or shows funds that were never separated.
Records you cannot produce
Every document you cannot locate is itself a finding. Auditors treat it that way, and so do we.
If your policies prevent uploading records to a vendor portal, you can email files instead, or walk through them with us on a call.
This is a compliance question, not just a bookkeeping one
Federally obligated airports answer to the FAA grant assurances, and the updated compliance manual, Order 5190.6C, took effect in February 2026. Lease and revenue gaps are the raw material of Part 13 inquiries and Part 16 complaints, which any directly affected tenant can file.
The FAA conducts land use inspections at only 18 airports a year nationwide. Most fields are never externally checked, which is why these problems surface the hard way: in a county audit, a grand jury report, or a tenant complaint.
Grant Assurance 24: Fee and Rental Structure
Sponsors must maintain a fee and rental structure that makes the airport as self-sustaining as possible under the circumstances. Uncollected rent and frozen rates work directly against that obligation.
Grant Assurance 25: Airport Revenues
All revenue the airport generates must be spent on the airport. Revenue that leaks through unbilled escalations or unverified third-party reporting never makes it into that equation.
Grant Assurance 22: Economic Nondiscrimination
The airport must be available on reasonable terms without unjust discrimination. Tenants on undocumented or inconsistent terms are exactly what complainants point to.
How the audit works
One request, whatever records you can produce, and a findings report you can put in front of your board.
Create a free account
No card, no commitment. Your records go into your own private workspace, not a public form.
Share whatever records you have
Rent roll, lease documents, tenant list, in any state of completeness. Gaps are findings, not obstacles. Email works if uploads need approval on your end.
Get your findings report
Within 3 business days you get a written exception report: occupants without leases, unapplied escalations, expired agreements, missing certificates and deposits. Then we walk it with you.
Find out what your records would show an auditor
The audit is free, findings come back within 3 business days, and everything you share stays in your own private workspace. The worst case is a clean report you can hand to your board.
Start your free lease and revenue audit.
Tell us where to reach you and we will set up your audit workspace:
- See which occupants have no lease on file and which leases expired while tenants stayed.
- Catch escalations that were never applied and billed rates that drifted from the signed agreement.
- Get missing insurance certificates and security deposits flagged per tenant.
- Walk the findings with us on a call, with your records already organized in one place.
Hangar Direct is not an appraiser, a CPA or attestation audit firm, or a law firm, and does not provide legal, accounting, or tax advice. Audit findings are estimates prepared for management decision-making. Binding fair market value determinations and any enforcement matters should be referred to qualified professionals.