Transat A21N at Montreal on Oct 14th 2025, dual ADR failure

Last Update: November 12, 2025 / 18:17:27 GMT/Zulu time

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Incident Facts

Date of incident
Oct 14, 2025

Classification
Incident

Flight number
TS-538

Destination
Cancun, Mexico

Aircraft Registration
C-GOIM

Aircraft Type
Airbus A321-Neo

ICAO Type Designator
A21N

An Air Transat Airbus A321-200N, registration C-GOIM performing flight TS-538 from Montreal,QC (Canada) to Cancun (Mexico) with 182 passengers and 6 crew, was climbing through 1000 feet out of Montreal's runway 06R when the crew received NAV ADR (Air Data Reference) 1+2 fault messages, declared PAN PAN and decided to return to Montreal for a safe landing on runway 06L about 40 minutes after departure.

A replacement A321-200N registration C-GOIE reached Cancun with a delay of about 3 hours.

The occurrence aircraft returned to service about 56 hours after landing.
Aircraft Registration Data
Registration mark
C-GOIM
Country of Registration
Canada
Date of Registration
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Certification Basis
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TCDS Ident. No.
Manufacturer
Airbus
Aircraft Model / Type
A321-271NX
ICAO Aircraft Type
A21N
Year of Manufacture
Serial Number
Aircraft Address / Mode S Code (HEX)
Maximum Take off Mass (MTOM) [kg]
Engine Count
Engine Type
Main Owner
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Aircraft registration data reproduced and distributed with the permission of the Government of Canada.

Incident Facts

Date of incident
Oct 14, 2025

Classification
Incident

Flight number
TS-538

Destination
Cancun, Mexico

Aircraft Registration
C-GOIM

Aircraft Type
Airbus A321-Neo

ICAO Type Designator
A21N

This article is published under license from Avherald.com. © of text by Avherald.com.
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