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Amadeus AU Command: Air Taxi Auxiliary Segment

A complete guide to the AU command in Amadeus — how to create an air taxi auxiliary segment in a PNR, recording the airline, route, date, and service details.

Not every journey in a PNR is a scheduled commercial flight. Customers travelling to remote destinations, island resorts, or business sites without scheduled service often rely on air taxi operations — small aircraft chartered for a specific route and date. These services do not always appear in standard availability, but they still need to be recorded in the PNR so the booking reflects the full journey. The AU command is the Amadeus entry that handles this. It allows you to add an air taxi service as an auxiliary segment, including the airline, route, date, and service details. This guide explains what AU does, the correct syntax, and when it should be used.

What Does the AU Command Do?

AU is the Amadeus GDS command used to create an air taxi auxiliary segment in a PNR.

Category: Auxiliary Segments.

It is used to add an air taxi service as an auxiliary segment, including the airline, route, date, and service details.

The AU segment appears in the itinerary alongside the flight, hotel, and car segments, giving a complete picture of the trip. It records the air taxi arrangement for the traveller, the agent, and any colleague who may work on the booking later. Together with HU for hotels, CU for car rental, and RU for memo services, AU keeps the PNR as the single source of truth for the entire journey.

Syntax & Example

Create an air taxi auxiliary segment for a VIP air taxi service between Santiago de Compostela and Vigo:

AUIBNN1SCQVGO21JUL/VIP NEED JET

This creates an air taxi auxiliary segment recording the following details:

Airline reference — IB (Iberia)
Status and quantity — NN1 (one seat or unit requested)
Origin — Santiago de Compostela (SCQ)
Destination — Vigo (VGO)
Date — 21 July
Free-flow text — VIP NEED JET (service description)

The segment appears in the PNR itinerary as an air taxi element, immediately visible whenever the booking is retrieved or displayed.

When to Use AU

Use AU when adding an air taxi or similar auxiliary transportation service to a PNR. Typical scenarios include:

Arranging private air transport to a remote destination without scheduled service.
Adding a VIP or executive charter flight to a corporate booking.
Recording an island transfer where only light aircraft can operate.
Documenting a helicopter or small aircraft connection between two nearby cities.
Adding a last-minute air taxi arranged outside standard availability.
Recording air transport for a group or event where scheduled service is impractical.
Noting a supplier-arranged flight as part of a package tour or cruise itinerary.

How AU Fits Into Your PNR Management Workflow

A typical session using AU might look like this:

Retrieve the PNR with RT and confirm the flight itinerary is complete.
Confirm the air taxi details with the supplier and the customer — origin, destination, date, and service description.
Enter the AU entry with the correct airline reference, status, route, date, and free-flow text.
Verify the air taxi segment appears correctly by redisplaying the itinerary with RTIM.
Add any supporting remark with RM if extra detail is required — such as the operator name, aircraft type, or passenger manifest details.
Save the change with ER or ET.

How AU Relates to Other Auxiliary and PNR Element Commands

AU → creates an air taxi auxiliary segment in the PNR.
HU → creates a hotel auxiliary segment in the PNR.
CU → creates a car rental auxiliary segment in the PNR.
RU → creates a memo auxiliary segment for informational travel services.
RM → adds a general remark to the PNR.
RX → adds a corporate or business-related remark to the PNR.
RC → adds a confidential remark to the PNR.
OP → creates an option element for follow-up actions.
RH → displays the PNR history, including auxiliary segments.

The distinction: AU records air taxi transport, HU records hotel accommodation, CU records car rental, and RU records other informational services. Use AU when the air taxi should be visible as part of the trip itinerary.

Important: The AU entry records the air taxi information in the PNR. Whether it creates a bookable reservation depends on the format used and the supplier. In many cases, AU is used as an auxiliary segment to reflect an air taxi arranged outside the standard availability flow.

Always confirm the correct city codes, date, and service description before entering the segment. A wrong origin, destination, or date will be visible in the itinerary and could mislead the passenger or the next agent working on the booking.

Frequently Asked Questions

What does the AU command do in Amadeus?

AU creates an air taxi auxiliary segment in a PNR, recording the airline, route, date, and service details.

What does AUIBNN1SCQVGO21JUL/VIP NEED JET mean?

It creates an air taxi auxiliary segment between Santiago de Compostela (SCQ) and Vigo (VGO) on 21 July, with the free-flow description VIP NEED JET.

Does AU create an actual air taxi booking?

The AU entry records the air taxi information in the PNR. Depending on the format and the supplier, it may create a bookable reservation or act as an auxiliary segment reflecting a service arranged outside the standard booking flow.

Where does the AU segment appear in the PNR?

It appears in the itinerary as an air taxi element. Retrieve the PNR with RT or review it with RTIM to see it alongside the flight segments.

How is AU different from HU or CU?

HU records hotel accommodation, CU records car rental, and AU is specifically for air taxi or similar auxiliary air transportation.

Conclusion

The AU command is the air taxi auxiliary segment tool in Amadeus. Use AUIBNN1SCQVGO21JUL/VIP NEED JET to record an air taxi service in the PNR, including the airline reference, origin and destination cities, travel date, and a free-flow description of the service. The segment appears in the itinerary alongside the flight, hotel, and car segments, giving anyone reviewing the booking a complete picture of the trip. Always confirm the details with the supplier and the customer before entering the AU entry, and remember that the segment is the record of the air taxi arrangement — whether or not it constitutes a bookable reservation depends on the format and supplier. Paired with RT for retrieval, RTIM for itinerary display, HU for hotels, CU for car rental, RU for memo services, RM and RC for remarks, XE to delete an incorrect segment, and RH for reviewing the history, the AU command completes your auxiliary segment toolkit and keeps every booking’s full air taxi details properly documented.