India B773 over China on May 27th 2026, TCAS failure

Last Update: May 27, 2026 / 16:58:09 GMT/Zulu time

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Incident Facts

Date of incident
May 27, 2026

Classification
Incident

Airline
Air India

Flight number
AI-173

Departure
Delhi, India

Aircraft Registration
VT-ALL

Aircraft Type
Boeing 777-300

ICAO Type Designator
B773

An Air India Boeing 777-300, registration VT-ALL performing flight AI-173 from Delhi (India) to San Francisco,CA (USA) with 230 people on board, was enroute at 9500 meters (FL311) over China when the crew decided to turn around and return to Delhi due to non-working TCAS, which is mandatory for the Oceanic Crossing. The aircraft landed safely back in Delhi about 8:25 hours after departure.

The airline reported a technical malfunction indicating the TCAS was not working properly, so that the airline asked the pilots to return to Delhi.
Incident Facts

Date of incident
May 27, 2026

Classification
Incident

Airline
Air India

Flight number
AI-173

Departure
Delhi, India

Aircraft Registration
VT-ALL

Aircraft Type
Boeing 777-300

ICAO Type Designator
B773

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