Serious incident Airbus A321-211 VQ-BOZ, 25 Jan 2013
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ASN Wikibase Occurrence # 152764
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Time:03:40 LT
Type:Silhouette image of generic A321 model; specific model in this crash may look slightly different    
Airbus A321-211
Owner/operator:Ural Airlines
Registration: VQ-BOZ
MSN: 2117
Fatalities:Fatalities: 0 / Occupants: 227
Other fatalities:0
Aircraft damage: Substantial
Category:Serious incident
Location:Kazan International Airport (KZN/UWKD) -   Russia
Phase: Approach
Nature:Passenger - Scheduled
Departure airport:Sharm el-Sheikh Airport (SSH)
Destination airport:Kazan International Airport (KZN/UWKD)
Confidence Rating: Information verified through data from accident investigation authorities
Ural Airlines flight SVR3046 departed from Sharm el-Sheikh (SSH), South Sinai, Egypt on a service to Kazan (KZN), Tartarstan, Russia.
Visibility at Kazan was poor with a cloud base at 30 meters (100 ft) and a visibility of 800 meters (2625 ft). After breaking through the clouds the captain decided to execute a missed approach. The rear fuselage contacted a localizer antenna before the airplane climbed away.
A safe landing was then carried out without injury to the occupants. The airplane sustained substantial damage to the rear fuselage.
After the incident, the ILS for runway 12L/29R was Notamed unserviceable.

The investigation showed that the characteristics of the glide path radio beacon of runway 29R did not meet the established requirements, which was due to violation of the manufacturing process and the use of obsolete high-frequency cables in the manufacturing plant.
Under the conditions of decreasing ambient temperature, the phases of the signals feeding the lower and middle antenna changed by different values, causing "unphasing" of the antenna system. The difference in phase at lowering the temperature was 53° (the maximum permissible difference in phase during operation is ±8°). More than sixfold "de-phasing" resulted in significant changes in all output parameters of the glideslope beacon.

METAR about the time of the incident:
UWKD 242330Z 11002MPS 0900 R29R/P1500 FZFG VV001 M23/M26 Q1006 798/0050 NOSIG RMK QBB030 QFE743/0991

Sources: (Photo) (Ministry of Emergency Situations, Tatarstan region)

Other occurrences involving this aircraft

15 Aug 2019 VQ-BOZ Ural Airlines 0 ca 5 km SE of Zhukovsky International Airport (ZIA) sub

Revision history:

25-Jan-2013 04:28 Hans Gruber Added
25-Jan-2013 04:36 harro Updated [Time, Aircraft type, Registration, Cn, Narrative]
25-Jan-2013 04:44 harro Updated [Narrative]
25-Jan-2013 05:19 Anon. Updated [Source]
25-Jan-2013 09:37 Geno Updated [Location, Phase, Source, Damage, Narrative]
25-Jan-2013 13:32 paridom Updated [[Location, Phase, Source, Damage, Narrative]]
27-Jan-2013 02:30 Hans Gruber Updated [Total occupants, Source]
27-Jan-2013 02:30 harro Updated [Source]
15-Feb-2021 17:03 harro Updated [Location, Departure airport, Destination airport]
15-Feb-2021 17:07 harro Updated [Phase, Narrative]

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