S7 A20N at Irkutsk on Jan 21st 2018, descended below profile on approach

Last Update: January 22, 2018 / 22:48:35 GMT/Zulu time

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Incident Facts

Date of incident
Jan 21, 2018

Classification
Incident

Flight number
S7-3275

Destination
Irkutsk's runway 12 cleared to descend to 600

Aircraft Registration
VQ-BCK

Aircraft Type
Airbus A320-200N

ICAO Type Designator
A20N

Airport ICAO Code
UIII

A S7 Sibir Airlines Airbus A320-200N, registration VQ-BCK performing flight S7-3275 from Novosibirsk to Irkutsk (Russia), was on approach to Irkutsk's runway 12 cleared to descend to 600 meters (2000 feet AGL), before the aircraft intercepted the glideslope the controller cleared the flight to descend to 450 meters (1500 feet AGL), the aircraft however continued to descend below that cleared height. When tower called the aircraft, due to radio traffic congestion with a bit of delay, the crew initiated a go around about 8km (4.3nm) before the runway threshold at 270 meters (885 feet AGL). The aircraft positioned for another approach and landed safely on runway 12 about 15 minutes after the go around.

Rosaviatsia reported the aircraft had followed the BD1C standard arrival route and was cleared to descend to 600 meters. Before being established on the glide slope the aircraft was cleared to descend to 450 meters (1500 feet AGL), however, descended below 450 meters. Due to traffic congestion on the radio the controller could not immediately intervene. When the controller finally reached the crew and asked about their current height and pressure setting on the altimeter, the crew initiated a go around at 270 meters (885 feet AGL) about 8km (4.3nm) before the runway threshold (Editorial notes: on the 3.3 degrees glideslope for runway 12 the aircraft should have been at 475 meters/1560 feet AGL (3140 feet MSL), Rosaviatsia did not mention which type of final approach - ILS, VOR/DME or Two NDB approach - the aircraft was performing, however, only ILS was possible with the present weather conditions). Rosaviatsia annotated that the aircraft should have intercepted the glideslope at about 10km (5.4nm) before the runway threshold at 600 meters.

Metars:
UIII 212300Z 10002MPS 2400 BR OVC002 M39/M43 Q1041 R12/390245 NOSIG RMK QBB080 QFE738/0984=
UIII 212230Z 08001MPS 2100 BR OVC004 M39/M43 Q1041 R12/390245 NOSIG RMK QBB120 QFE738/0984=
UIII 212200Z 09002MPS 5000 BR OVC003 M40/M44 Q1041 R12/390245 NOSIG RMK QBB110 QFE738/0984=
UIII 212130Z 08002MPS 3500 BR OVC003 M40/M44 Q1042 R12/390245 NOSIG RMK QBB110 QFE738/0984=
UIII 212100Z 08002MPS 2700 BR BKN003 M40/M44 Q1042 R12/390245 NOSIG RMK QBB090 QFE738/0984=
UIII 212030Z 09002MPS 5000 BR SCT004 M39/M43 Q1042 R12/390245 NOSIG RMK QBB130 QFE738/0984=
UIII 212000Z 09002MPS 2200 BR SCT005 M41/M45 Q1042 R12/390245 NOSIG RMK QBB150 QFE738/0985=
UIII 211930Z 08001MPS 2000 R12/P2000U BR SCT001 M40/M44 Q1042 R12/390245 NOSIG RMK QBB050 QFE739/0985=
UIII 211900Z VRB01MPS 2700 1200S BR FEW006 M40/M43 Q1042 R12/390245 NOSIG RMK QBB200 QFE739/0985=
UIII 211830Z 09001MPS 3500 BR FEW006 M39/M43 Q1043 R12/390245 NOSIG RMK QBB200 QFE739/0985=
UIII 211800Z 09002MPS 2200 BR FEW003 M40/M44 Q1043 R12/390245 NOSIG RMK QBB110 QFE739/0985=
Incident Facts

Date of incident
Jan 21, 2018

Classification
Incident

Flight number
S7-3275

Destination
Irkutsk's runway 12 cleared to descend to 600

Aircraft Registration
VQ-BCK

Aircraft Type
Airbus A320-200N

ICAO Type Designator
A20N

Airport ICAO Code
UIII

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