Nordstar B738 at St. Petersburg on Dec 16th 2020, too high on approach, malfunction of navigation equipment
Last Update: January 26, 2021 / 19:54:29 GMT/Zulu time
Incident Facts
Date of incident
Dec 16, 2020
Classification
Incident
Airline
Nordstar Airlines
Flight number
Y7-1061
Departure
Moscow Domodedovo, Russia
Destination
St. Petersburg, Russia
Aircraft Registration
VQ-BDO
Aircraft Type
Boeing 737-800
ICAO Type Designator
B738
Airport
Pulkovo Airport, St. Petersburg
Airport ICAO Code
ULLI
Pulkovo Airport reported the crew reported a technical malfunction of the navigation equipment.
At about 2100 feet above the aerodrome level at 2.35nm out, the aircraft would have needed to descend on an about 8 degrees glidepath (asin(600 meters/4352 meters)). The correct height would have been 227 meters/744 feet. The second approach maintained an about 3 degrees degrees glideslope. Further analysis of the ADS-B data transmitted by the aircraft show, on the first approach the aircraft intercepted the localizer about 7.5nm out at 2300 feet (hence this was not an intercept from above the glideslope).
In Jan 2021 Rosaviatsia reported the crew reported problems with the FMS and requested to reenter the approach following reentry of the data into the FMS. The aircraft received radar vectors to re-join the final approach in visual meteorologic conditions.
Metars:
ULLI 161800Z 22004MPS 9999 SCT011 OVC017 M00/M01 Q1009 R28R/520545 NOSIG=
ULLI 161730Z 22004MPS 9999 SCT010 OVC018 M00/M01 Q1009 R28R/520545 NOSIG=
ULLI 161700Z 21004MPS 190V250 9999 FEW010 SCT018CB OVC030 M00/M01 Q1009 R28R/520545 NOSIG=
ULLI 161630Z 21003MPS 9999 -SHSN SCT008 BKN018CB OVC030 M01/M01 Q1009 R28R/520545 NOSIG=
ULLI 161600Z 20004MPS 180V240 9999 -SHSN SCT010 BKN021CB OVC036 M01/M01 Q1009 RESHSN R28R/520545 NOSIG=
ULLI 161530Z 20003MPS 150V250 8000 -SHSN SCT010 BKN020CB OVC036 M01/M01 Q1010 R10R/551039 NOSIG=
ULLI 161500Z 19003MPS 150V250 9999 SCT010 BKN020CB OVC036 M01/M01 Q1010 R10R/551039 NOSIG=
ULLI 161430Z 20004MPS 140V270 9999 SCT011 OVC025 M01/M01 Q1010 R10R/551039 NOSIG=
ULLI 161400Z 19003MPS 130V240 9999 SCT007 BKN030CB OVC043 M01/M01 Q1010 RESHSN R10R/551039 NOSIG=
ULLI 161330Z 18003MPS 1100 1000NW R10R/P2000D R10L/2000N SHSN BKN005 BKN018CB OVC036 M01/M01 Q1011 R10R/591039 R10L/591031 NOSIG RMK OBST OBSC=
ULLI 161300Z 19003MPS 1600 1400NW R10L/P2000D SHSN BKN005 BKN018CB OVC033 M01/M01 Q1011 R10L/591031 NOSIG RMK OBST OBSC=
Incident Facts
Date of incident
Dec 16, 2020
Classification
Incident
Airline
Nordstar Airlines
Flight number
Y7-1061
Departure
Moscow Domodedovo, Russia
Destination
St. Petersburg, Russia
Aircraft Registration
VQ-BDO
Aircraft Type
Boeing 737-800
ICAO Type Designator
B738
Airport
Pulkovo Airport, St. Petersburg
Airport ICAO Code
ULLI
This article is published under license from Avherald.com. © of text by Avherald.com.
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