ASN Wikibase Occurrence # 247849
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| Date: | Friday 25 January 2013 |
| Time: | 03:30 LT |
| Type: |  Airbus A319-112 |
| Owner/operator: | Tatarstan Airlines |
| Registration: | VQ-BNF |
| MSN: | 3331 |
| Year of manufacture: | 2007 |
| Engine model: | CFMI CFM56-5B6/P |
| Fatalities: | Fatalities: 0 / Occupants: |
| Aircraft damage: | Substantial |
| Category: | Serious incident |
| Location: | Kazan International Airport (KZN/UWKD) -
 Russia
|
| Phase: | Approach |
| Nature: | Passenger - Scheduled |
| Departure airport: | |
| Kazan International Airport (KZN/UWKD) | |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
The Airbus A319, VQ-BNF, began a premature descent at night to Kazan Airport. Visibility at Kazan was poor with a cloud base at 30 meters (100 ft) and a visibility of 800 meters (2625 ft).
On reaching an altitude of 13 meters, the airplane was 375 meters away from the runway 29R threshold. At an altitude of 5 meters, having determined that the airplane was not landing, the crew abruptly pulled on the control stick, causing the airplane to soar from less than 1 meter to a height of 7 meters. Instead of going around, the crew brought the airplane into a smooth descent, after which it landed safely.
Ten minutes later an Ural Airlines Airbus A321 also began a premature descent, striking a localizer antenna during a go around.
After the incidents, 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:
http://lifenews.ru/news/109853
http://lifenews.ru/news/109862 (Photo)
http://16.mchs.gov.ru/news/detail.php?news=27991 (Ministry of Emergency Situations, Tatarstan region)
http://www.airliners.net/photo/Ural-Airlines/Airbus-A321-211/2166026/L?sid=e162f88822b14958092ec8d0f7f7e427
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Feb-2021 17:13 | harro | Updated [Total occupants, Departure airport, Narrative] |
Corrections or additions? ... Edit this accident description
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