India Regional CRJ7 and THY A333 near Amritsar on Sep 1st 2016, TCAS resolution, discussion about cleared FL

Last Update: September 4, 2016 / 16:11:44 GMT/Zulu time

Bookmark this article
Incident Facts

Date of incident
Sep 1, 2016

Classification
Incident

Flight number
AI-8613

Departure
Delhi, India

Destination
Jammu, India

Aircraft Registration
VT-RJE

Aircraft Type
Canadair CRJ-700

ICAO Type Designator
CRJ7

An Air India Regional Canadair CRJ-700, registration VT-RJE performing flight AI-8613 from Delhi to Jammu (India), was enroute at FL360 south to north about 35nm southeast of Amritsar (India).

A THY Turkish Airlines Airbus A330-300, registration TC-LNC performing flight TK-713 from Dhaka (Bangladesh) to Istanbul (Turkey), was enroute at FL360 east to west about 35nm southeast of Amritsar (India).

A listener on frequency reported it got hectic on the frequency for a while when ATC tried to reach two aircraft and issue resolving vectors repeatedly using the word "immediately". Then it got silent for a brief moment, then the Turkish crew could be heard reporting "clear of conflict".

TK-713 turned out of the airway to the north on ATC instruction trying to resolve the conflict, AI-9613 began a descent, however, not soon enough to avoid a TCAS Resolution Advisory activating in both aircraft instructing TK-713 to climb and AI-9613 to descend. AI-9613 descended to FL330 and continued the flight at FL330, while TK-713 returned to their assigned FL360 after climbing about 200 feet and subsequently turned back onto the airway.

Transponder data suggest that TK-713 had climbed to FL360 at 02:18Z about 90nm east of Delhi and 250 track miles to point of conflict, AI-9613 had reached FL360 at 02:39Z about 80nm south of the point of conflict. At 02:48:01Z both aircraft were maintaining FL360 on a conflicting heading at a closing speed of about 700 knots, the horizontal distance between the aircraft had reduced to 10.7nm. At 02:49:00Z the horizontal distance had decreased to 4.1nm, the vertical separation increased to 900 feet, the conflict was resolved soon after.

The listener reported that after both aircraft were clear of conflict a discussion went on on frequency that AI-9613 had been cleared only to FL330 (from the point of conflict it was about 110nm track miles to Jammu, and about 180-200 track miles from Delhi).

Both aircraft landed safely at their destinations.
Incident Facts

Date of incident
Sep 1, 2016

Classification
Incident

Flight number
AI-8613

Departure
Delhi, India

Destination
Jammu, India

Aircraft Registration
VT-RJE

Aircraft Type
Canadair CRJ-700

ICAO Type Designator
CRJ7

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

You can read 4 more free articles without a subscription.

Subscribe now and continue reading without any limits!

Are you a subscriber?
Login
Subscribe

Read unlimited articles and receive our daily update briefing. Gain better insights into what is happening in commercial aviation safety.

Free newsletter

Want to know more and stay ahead? Get our free weekly newsletter and join 4946 existing subscribers.

By subscribing, you accept our terms and conditions and confirm that you've read our privacy policy.

Send tip

Support AeroInside by sending a small tip amount.

Related articles

Newest articles

Subscribe today

Are you researching aviation incidents? Get access to AeroInside Insights, unlimited read access and receive the daily newsletter.

Pick your plan and subscribe

Partner

Blockaviation logo

A new way to document and demonstrate airworthiness compliance and aircraft value. Find out more.

Virtual Speech logo

ELITE Simulation Solutions is a leading global provider of Flight Simulation Training Devices, IFR training software as well as flight controls and related services. Find out more.

Get updates

Never miss an article from AeroInside. Subscribe to our free weekly newsletter and join 4946 existing subscribers.

By subscribing, you accept our terms and conditions and that you've read our privacy policy.

AeroInside Blog
Popular aircraft
Airbus A320
Boeing 737-800
Boeing 737-800 MAX
Popular airlines
American Airlines
United
Delta
Air Canada
Lufthansa
British Airways