Accident Boeing 737-4Q8 EP-TBJ,

ASN Wikibase Occurrence # 319901

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Date:	Monday 27 March 2017
Time:	10:06
Type:	Boeing 737-4Q8
Owner/operator:	Taban Air
Registration:	EP-TBJ
MSN:	28202/3009
Year of manufacture:	1998
Total airframe hrs:	46231 hours
Cycles:	25674 flights
Engine model:	CFMI CFM56-3C1
Fatalities:	Fatalities: 0 / Occupants: 185
Aircraft damage:	Substantial, repaired
Category:	Accident
Location:	Ardabil Airport (ADU) - Iran
Phase:	Landing
Nature:	Passenger - Scheduled
Departure airport:	Mashhad Airport (MHD/OIMM)
Destination airport:	Ardabil Airport (ADU/OITL)
Investigating agency:	AAIB Iran
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
Taban Air flight 6243, a Boeing 737-400, suffered severe vibrations on touchdown on runway 33 at Ardabil Airport, Iran. The right-hand main gear leg folded inwards and the aircraft tilted to the right, causing the no.2 engine to hit the runway.

The aircraft was ferried to Mashhad on May 1 and test flown after repairs on June 18, 2017. It re-entered service on June 21.

Main cause:
The main cause of the crash was a technical failure in the Shimmy Damper of the right-hand landing gear system.
Contributory factors:
- Failure to comply with the pilot's operating instructions
- Lack of technical supervision and disregard for the manufacturer's publications
- Weak design of landing gear control systems) Inspection of Shimmy Damper system and poor Torsion Link metallurgy
- Lack of quality oversight of Taban Airlines technical training units

METAR:

05:00 UTC / local time:
OITL 270500Z 25006KT CAVOK 06/M02 Q1017

06:00 UTC / local time:
OITL 270600Z 20023KT 9999 FEW035 SCT200 13/M02 Q1016

Accident investigation: