Serious incident to the Airbus A350 registered A7-ANO operated by Qatar Airways and to the McDonnell Douglas MD83 registered EP-CAS operated by Caspian Airlines on 12/04/2021 en route

Dépassement du niveau attribué en montée, avis de résolution TCAS, alerte de décrochage

Responsible entity

Iran, Islamic Republic of - AIB

Preliminary data based on the notification from the Islamic Republic of Iran authorities:

Due to auto pilot malfunction aircraft (MD83) climbed 400 feet above cleared level and caused RA and A350 got speed alert (stall Warning) while climbing .

Loading map...

General information
Local date	12/04/2021
Responsible entity	Iran, Islamic Republic of - AIB
State or area of occurrence	Iran, Islamic Republic of
Location	en croisière
Human consequences	None
Aircraft consequences	None
Occurrence class	Serious incident
File number	BEA2021-0169

Flight Information
Aircraft category	Aeroplane - Large aeroplane
Operator	Qatar - Qatar Airways Company
Manufacturer / Model	AIRBUS - A350
Aircraft Registration	A7-ANO
State of registry	Qatar
Last departure point	Qatar - OTBD (DOH): Doha/Intl
Planned destination	United States of America - KLAX (LAX) [LAX]Los Angeles,Ca/Los Angeles Intl
Flight phase	En route
Serial number	368
Operator Type AG
Operation Type	Commercial Air Transport - Passenger - Airline

Second aircraft involved
Aircraft category	Fixed Wing Aeroplane Large Aeroplane Large Aeroplane
Operator	Iran, Islamic Republic of Caspian Airlines
Manufacturer / Model	DOUGLAS DC9 80 83
Aircraft Registration	EP-CAS
State of registry	Iran, Islamic Republic of
Last departure point	Iran, Islamic Repuplic of OIII (THR): Tehran/Mehrabad Intl
Planned destination	Iran, Islamic Repuplic of OIBK (KIH): Kish I.
Flight phase	En route
Serial number	53632
Operator Type AG
Operation Type	Commercial Air Transport Unknown

BEA is the French air safety investigation authority for civil aviation. The sole objective of the investigation is to improve air safety. It is intended neither to apportion blame nor to assess responsiblity.