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Weather data for flights at Irkutsk airport is provided by Irkutsk AMS,
which is part of the autonomous noncommercial organization Irkutskoye
Meteoagentstvo on the basis of the following:
1. Civil Aviation Meteorological Manual 95;
2. License no. R/2002/0272/100/L of August 12, 2002
3. Charter of the autonomous noncommercial organization Irkutskoye
Meteoagentstvo
4. Regulations governing the Irkutsk AMS;
5. Instructions for providing meteorological data for flights at Irkutsk
airport;
6. Contract no. МО-013-06.
Irkutsk airport has an airport meteorological information and measuring
station (KRAMS-4) which started to operate on Dec. 1, 2003 and whose
certification is valid until Aug. 9, 2011. The station is operational and tested (the
certificates of inspection of the measuring instruments were valid until Nov. 18,
2006). KRAMS-4 meets the 1992 Airport Operating Standards (AOS-92) in
terms of location. The meteorological equipment of Irkutsk airport includes no
weather radar.
Personnel of AMS Irkutsk have undergone training during the springsummer
period of 2006. There is a record of authorization to work dated March
24, 2006.
On July 8 meteorological data at Irkutsk airport were provided by the
duty meteorologist. She had access to work on the KRAMS-4. She had been
working as a meteorologist for 17 years. In 2001 she graduated from Irkutsk
University by correspondence course with a degree in meteorology. There was
no advanced training conducted at AMS Irkutsk for weather observers.
The forecast was compiled by a category 1 weather forecaster S. She had
been working as a forecaster for 24 years. She underwent advanced training in
2005 at the Irkutsk branch of the Institute of Aero navigation.
The actual weather at Irkutsk airport at 22:00 on July 8, 2006 according to
LIMA, as obtained by the crew via the ATIS channel:
"Irkutsk - ATIS, information for arrival LIMA 22:00: approach LSE,
VOR/DME runway 30, wet 100%, 2 mm. Friction 0.50. Transition level 1800,
reference altitude 1217 m, passage of birds in the area of take-off and landing
possible. Surface wind 280 degrees - 4 m/s, altitude 30 m: 280 degrees - 5 m/s,
circuit: 350 degrees - 10 m/s, visibility 3500 m, weak showers, complete
cumulonimbus 170, temperature 11 degrees, dew point 10 degrees, pressure 707
Final Report
INTERGOVERNMENTAL AVIATION COMMITTEE
35
mmhg or 943 gPa. No major changes. There is work in progress at the threshold
lip of runway 30 at a distance of 340 m, equipment at a height of 3 m."
The actual weather at Irkutsk airport at 22:30 on July 8, 2006 according to
Mike information:
"Irkutsk - ATIS, information for arrival Mike 22:30: approach LSE,
VOR/DME runway 30, wet 100%, 2 mm. Friction 0.50. Transition level 1800,
reference altitude 1217 m, passage of birds in the area of take-off and landing
possible. Surface wind 270 degrees - 4, altitude 30 m: 290 degrees - 5, circuit:
350 degrees - 10, visibility 3500 m, weak showers, 8 octants cumulonimbus at
an altitude of 190 m, temperature 11 degrees, dew point 10 degrees, pressure
707 mmhg or 943 gPa. No major changes. There is work in progress at the
threshold lip of runway 30 at a distance of 340 m, equipment at a height of 3 m.
Please confirm receipt of MIKE information".
Note: According to the conversion tables provided in
AIP AD 1.2-1 of Russia the friction of 0.5
corresponds to "good" calculated braking
effectiveness.
At the request of the approach controller via the PA system at 22:36 (6
minutes before landing), the altitude of the cloud base was measured. The result
of the measurement was 190 m.
Upon hearing the alarm signal on 22:49, the duty meteorologist carried
out an extraordinary observation of the weather. The following weather was
observed: surface wind: 280 degrees - 5 m/s, wind at an altitude of 30 meters:
290 degrees - 5 m/s, visibility 3500 m, weak showers, cloud cover - complete
cumulonimbus, cloud base 190 m, atmospheric pressure 707 mmhg, temperature
10.7 degrees, air humidity 93%. Additional information: MKp 295 degrees,
wind at the altitude of the circuit: 350 degrees - 10 m/s, friction 0.5. Forecast
for approach "without changes".
According to data from the visibility detectors mounted at the threshold
of runway 30 and in the middle of the runway, visibility was 4400 m - 5600 m
from 22:30 until the moment of the accident. According to the Instructions for
providing meteorological data for flights at Irkutsk airport, visibility is
determined visually according to natural reference points if instruments set
visibility at more than 3000 m. The meteorologist visually determined visibility
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FINAL REPORT ON THE RESULTS OF THE INVESTIGATION OF THE ACCI(15)
