This document helps you quickly check whether the changes in this release affect your day-to-day operations. Changes are grouped by functional area, so each department can review only the sections relevant to them. Impact statements are based on an analysis of the actual application code.
How to read this document
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Who is affected tells you whether the change applies to you, based on the features you use, the way you work, or your configuration.
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Entries marked "No impact on current operations" require no action.
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More information links point to the related article on the Leon wiki.
OPS
New "Charter source" field on trips
What changed: A new optional field "Charter source" is available in the Trip tab. It lets you record who sourced the charter: Owner, Operator or 3rd party. The field is also available as a column and a filter in Report Wizard (Trip and Flight scopes).
Who is affected: No one until you start using it. The field appears only for PAX Charter and Cargo Charter trips, is empty by default and is not mandatory.
New Journey Log fields
What changed: New fields can be recorded in the Journey Log: Duty time (entered manually in HHH:MM format, not used in FTL calculations), IFR Flight Time and VFR Flight Time (filled in automatically with the flight time, depending on the flight rule: I for IFR, V for VFR), Extra Baggage and Payload (numeric fields with a weight unit, taken by default from the "Load weight unit" in the aircraft profile) and Crew fitness (checkbox). All new fields are available as columns in Report Wizard.
Who is affected: No one until you start using them. This is a new, optional feature. To start using it: add the fields you need in your Journey Log configuration.
Aircraft changes visible in Journey Log history
What changed: The Journey Log change history now also shows when the aircraft assigned to a flight was changed, so you can easily see when and to which registration a flight was moved.
Who is affected: All operators using the Journey Log. This is an additional entry in the history view. No impact on current operations.
Fewer duplicate automatic MVT messages
What changed: In MVT rules you can now exclude updates coming from Eurocontrol from triggering an automatic MVT message. This prevents recipients from receiving several similar messages for the same event.
Who is affected: No one until you enable it. This is a new, optional setting. To start using it: edit your MVT rules and exclude Eurocontrol updates.
New MVT template variable: TOTAL_EXPECTED_DELAY
What changed: MVT message templates support a new variable, TOTAL_EXPECTED_DELAY. It shows the difference between ETD and STD in HH:MM format, regardless of the delay codes entered. If no ETD is entered, the value stays empty.
Who is affected: No one until you add the variable to an MVT template. Existing templates are not changed.
Default "To" recipients in Custom email templates
What changed: In Email Templates of the Custom type you can now define default recipients in the "To" field (one or more addresses, the same way as in the CC field). When sending, recipients are filled in automatically according to this configuration.
Who is affected: No one until you configure it. Existing templates keep working as before.
Preferred fuel suppliers shown even without a price file
What changed: The FUEL tab on a flight now lists fuel suppliers marked as "preferred" even when no price file has been uploaded for them in OPS > Fuel Prices. In that case, the supplier is shown without a price, so you can immediately see that the price list is not available in Leon.
Who is affected: Operators who mark fuel suppliers as "preferred" in OPS > Fuel Prices. You may now see additional supplier entries without a price on the FUEL tab.
Default expiry date for fuel prices
What changed: Fuel prices uploaded without an explicit expiry date no longer stay active indefinitely. Leon now sets their expiry date to 30 days after upload by default, so outdated prices are no longer suggested on flights. The number of days can be changed in General Settings > Fuel prices.
Who is affected: Operators who upload fuel price files that do not contain an expiry date. Prices from such files will expire after 30 days unless a newer file is uploaded.
Recommended action: If you upload fuel price files less often than every 30 days, adjust the number of days in General Settings > Fuel prices.
Hotel and DELISKY checklist items can be moved between groups
What changed: In checklist configuration, the Hotel and DELISKY items can now be moved between the OPS, SALES and FLIGHT CARE groups, so the checklist layout can match the way your team works.
Who is affected: No one until you change your checklist configuration. The current layout stays as it is.
FTL
FTL rule for line training (18+2)
What changed: Leon now supports the special FTL rule for line training (18+2). In FTL settings you can select training positions for which Leon applies the limits of this rule: maximum 20 landings, 11 hours FDP and 6 hours flight time, and an extended rest period when the full landing limit is used within the WOCL.
Who is affected: No one until you enable it. This is a new, optional feature. To start using it: select the relevant training positions in your FTL settings.
Local time in FTL Calculations
What changed: The FTL Calculations section now supports local time. Use the time zone toggle to display all times converted to the local time of the airport.
Who is affected: No one until you switch the toggle. This change should not affect your current operations.
Sales
Automatic French Airport Tax
What changed: Leon now calculates the French Airport Tax automatically, in the same way as the other taxes supported in the Sales module. You no longer need to add it manually to quotes. Report Wizard (Trips scope) includes new columns with the values of this tax.
Who is affected: Operators who prepare quotes for flights to or from French airports. The tax will now appear in the price calculation of these quotes.
Recommended action: Review a few quotes involving French airports and remove any manual price items you previously used for this tax, to avoid charging it twice.
Consistent Flight Time for Avinode quotes
What changed: Flight Time for quotes imported from Avinode is now calculated consistently with the result of the Calculate Flight Time function.
Who is affected: Operators using the Avinode integration to import quote requests. Flight Time on newly imported quotes may differ slightly from before and will match the value you get from Calculate Flight Time.
Sales settings moved to a dedicated page
What changed: Part of the settings from General Settings > Sales has been moved to the dedicated Sales module settings page, with a new, clearer layout. All sales settings are now easier to find in one place.
Who is affected: Users who manage Sales settings. The settings keep their values; only their location has changed. This change should not affect your current operations.
Sched
SSIM re-import matches IATA and ICAO carrier codes
What changed: When an SSIM file is re-imported, Leon now correctly recognises flights listed under the carrier's IATA code when they are scheduled in Leon under its ICAO code (and the other way round). Leon updates these flights instead of deleting and re-adding them, so crew assignments and other flight data are kept.
Who is affected: Operators who import SSIM files in which the carrier code (IATA or ICAO) differs from the code used for the flights scheduled in Leon. Re-imports will now show updates instead of deletions and additions for these flights.
Automatic Fleet Planning keeps existing aircraft assignments
What changed: Automatic Fleet Planning now takes the current aircraft assignments into account when optimising the plan, keeping the number of changes as low as possible.
Who is affected: Operators using Automatic Fleet Planning. Proposed plans will now stay closer to your current aircraft assignments.
Airport Directory
Custom slot validity times per airport
What changed: For each airport you can define its own slot validity times, different from the default (-5 / +10 minutes), within a range of -30 to +30 minutes. This helps you quickly check whether a slot (or PPR) needs to be adjusted after a schedule change. The values are shown in the airport tooltip in OPS views (when "Slot required" is selected) and can be printed on OPS documents, for example the Trip Sheet.
Who is affected: No one until you set custom values for an airport. Airports without custom values keep the default slot validity times.
Approved date for Suppliers and Hotels
What changed: In the Suppliers and Hotels tabs in Airport Directory you can now set the supplier approval date (Approved date), as was already possible for Ground Handlers and Fuel. Changes to this date are recorded in the change history.
Who is affected: No one until you start using it. This is a new, optional field.
Wingman and MCP
New MCP tools to read hotel bookings
What changed: AI agents connected to Leon can now not only create hotel bookings but also read them, for example to detect bookings that are no longer valid after a schedule change or to avoid duplicates. The new tools let agents retrieve bookings by date range, airports and crew members, by selected flights or trips, and list bookings that no longer match the current schedule.
Who is affected: No one until you use them. The tools are available only to operators who connect AI agents to the Leon MCP server.
Easier connection of AI clients to the Leon MCP server
What changed: The Leon MCP server now supports automatic discovery of the OAuth authorization configuration, in line with the current MCP specification. AI clients (for example Claude or ChatGPT) can now sign in without entering addresses manually.
Who is affected: Operators who connect, or plan to connect, AI clients to the Leon MCP server. Connecting a new client is now simpler. This change should not affect your current operations.
Admin
Add-ons panel shows integrations activated by individual users
What changed: The Add-ons panel now also shows integrations activated by individual users or crew members. An integration used by at least one person is shown as active, and its tile includes a Users tab listing the people who enabled it.
Who is affected: Administrators with access to the Add-ons panel will see additional tiles. This change should not affect your current operations.
Phonebook exports in Audit Logs
What changed: Audit Logs now include the history of data exports from the Phonebook (new event type "Phonebook export"), making it easier to check who exported contacts and when.
Who is affected: Administrators reviewing Audit Logs. This change should not affect your current operations.
Automatic passenger deletion and auto-archiving work together
What changed: The "Automatically delete PAX after given days" and "Auto-archive PAX list" functions can now safely run at the same time. Archiving a passenger no longer causes them to be skipped by automatic deletion.
Who is affected: Operators who have both "Automatically delete PAX after given days" and "Auto-archive PAX list" enabled. Archived passengers will now be deleted according to your configured deletion period.
Recommended action: If you use both functions, confirm that your deletion period is set as intended before this release.
Internal changes
This release also includes internal technical improvements (performance, maintenance, security). These changes should not affect your current operations.