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Last A-check Zvartnots airport (Yerevan), by Sabena Technics, on
21.04.2006
Flying hours after the last check 102 h 20 min
42 landings
Last line maintenance («Daily
check»
Zvartnots airport (Yerevan), by Sabena Technics, on 2
May 2006
The airplane flight weight and balance were within established limitations (the maximum takeoff
weight is 73,500 kg). The airplane’s takeoff weight was 62,712 kg, and the centre of gravity was
29.9%. The total amount of fuel on board was 10,202 kg, and at takeoff the amount of fuel was
10,000 kg.
1.7 Meteorological Information
Meteorological support to flight RNV-967 was provided by a duty team at the Aviation
Meteorological Centre of Yerevan aerodrome (Zvartnots), and meteorological support from a
duty team from the Air Traffic Service of Sochi aerodrome was provided by Sochi 1st level Civil
Aviation Meteorological Station, which was part of the Specialized Black Sea and Sea of Azov
Hydrometeorology and Environment Monitoring Centre (license No. B 420592, registration No.
R/2002/0126/100/L, issued by Roshydromet on 25 December 2002, valid till 25 December 2007)
in accordance with the regulatory documents on meteorological support to flight operations
(ICAO Appendix 3, Guidance for Meteorological Support in Civil Aviation 95, and the
Instructions for meteorological support of the Sochi aerodrome).
On May 2, 2006 the synoptic situation near Sochi was determined by the influence of a secondary
low formed in a pressure trough above the Eastern part of the Black Sea.
A cold front with waves was formed along the Caucasian Edge and further to the East of Turkey.
There was continuous precipitation along the front, and rain showers in Adler.
12
With frequent cyclogenesis above the Black Sea coast of the Caucasus, especially in the spring
transition period, low cloud often forms, which was registered by Sochi Agrometeorological
Station situated nearby and Sochi Civil Aviation Meteorological Station. The recorded cloud
height was 100-200 m.
Before taking off from Yerevan, the crew of A320 EK-32009 had a flight weather briefing at the
Aviation Meteorological Centre of Yerevan airport (Zvartnots), where they got the flight
documentation (a form with forecast and observed weather at Sochi and alternative aerodromes,
the forecast wind and temperature chart at FL 300, as at 18:00 on 02.05.06, and weather
phenomena chart at FL 250-630, as at 18:00 on 02.05.06).
At the briefing, at 19:35, Captain G. Grigoryan signed the flight documents, which were handed
over to him in accordance with ICAO Annex 3, Section 9.4.1.
By the time the decision for departure was made, the observed weather at the destination airport
(Sochi) was the following, as at 19:00.
Surface wind – calm, visibility 2700 m, light rain showers, mist, considerable clouds (5-7 octant),
cloud ceiling at 1,200 m, temperature +11°С, dew point +11°С, pressure 1018 hPa; the two-hour
weather forecast for landing: no major changes, the mountains partially in cloud, friction
coefficient 0.5.
The weather forecast for Sochi on 02.05.06 from 18:00 to 03:00 was the following.
Wind 060º, 6 m/s, visibility more than 10 km, light rain showers, mist, scattered clouds (3-4
octant), cloud ceiling at 210 m; considerable (5-7 octant) cumulonimbus, cloud ceiling at 450 m;
considerable (5-7 octant) medium clouds, cloud ceiling at 3000 m; moderate turbulence beyond
the clouds, frequent turbulence in the layer from the ground to 600 m; in the period from 18:00 to
03:00 variable wind 2 m/s; visibility 800 m, fog, vertical visibility 600 m.
Note: While transmitting the weather report for the period from 18:00 to 03:00 into
the automatic data transmission system (for its further transmission into the
aviation meteorological database), a forecaster at the Sochi Civil Aviation
Meteorological Station mistakenly specified the vertical visibility in fog to be
600 m, rather than 60 m.
According to the Adler weather radar data, as at 20.50, 21.50, 22.50 on 2 May 2006 , there were
mostly sheet clouds with separate cumulonimbus producing light rain showers. The mean cloud
top was at 4200-5700 m. There were no potential thunderstorm cells or heavy showers.
On May 2, 2006 the synoptic situation was not considered favourable for vortex, which was
proved by the Tuapse radiosonde data, as at 12:00 on 2 May 2006 , and by calculation of the
probability of a vortex. In the period from 12:00 on 2 May 2006 to 00:00 on 03.05.06 the
probability of a vortex was zero.
After A320 EK-32009 took off from Yerevan airport (Zvartnots) and climbed to FL-300, its
cruise flight on the route from Yerevan to Sochi was going on in a fuzzy low pressure field.
　
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