ASN Wikibase Occurrence # 190140
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| Date: | Saturday 17 September 2016 |
| Time: | 05:39 |
| Type: |  de Havilland Canada DHC-8-402Q Dash 8 |
| Owner/operator: | AirBaltic |
| Registration: | YL-BAI |
| MSN: | 4302 |
| Year of manufacture: | 2010 |
| Fatalities: | Fatalities: 0 / Occupants: 67 |
| Aircraft damage: | Minor |
| Location: | Riga International Airport (RIX/EVRA) -
 Latvia
|
| Phase: | Landing |
| Nature: | Passenger - Scheduled |
| Departure airport: | Riga International Airport (RIX/EVRA) |
| ZRH | |
| Investigating agency: | TAIIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Front gear didn't fully retract after takeoff for flight BT641, the plane went on to burn down fuel and later emergency-landed safely back at RIX with front gear partially deployed (stuck a bit outside the fuselage at the same point it got stuck when taking off).
It's reported that only front gear bay doors were damaged during the landing.
Causes
Root cause:
Root cause is insufficient retention of the bushings in the LLL body.
Direct cause:
Excessive clearance in the mechanism by virtue of corrosion of LLL hole and wear of bushing OD.
Possible contributing causes:
1. Moisture and runway de-icers penetration in the joint, salt based (potassium formate and sodium acetate) cadmium plating dissolving and base metal corrosion progression.
2. Insufficient tightness applied in fastening bushings with LLL hole.
3. Possibility that the upper lock link pin failed simultaneously with the LLL pin or when the lugs of the lower drag strut came into contact with the upper lock link.
Accident investigation:
 |
|
Sources:
http://www.delfi.lv/news/national/politics/airbaltic-lidmasina-veikusi-avarijas-nosesanos-lidostas-riga-darbiba-atjaunota.d?id=47919889
https://www.flightradar24.com/data/flights/bt641/#b074035
http://www.taiib.gov.lv/uploads/FINAL%20REPORT%20No%201-18.pdf
Media:
Air Baltic Q400 emergency landing forces runway closure at Riga. https://t.co/ytVN6E5nVY #aviation #airlines #Riga pic.twitter.com/CnJ23W4pCq
— Pix From The Sticks (@ThePixiePress) September 17, 2016
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Sep-2016 15:48 | Kavacky | Added |
| 17-Sep-2016 15:51 | Kavacky | Updated [Total occupants] |
| 17-Sep-2016 17:41 | harro | Updated [Aircraft type, Cn, Operator, Source, Embed code] |
| 19-Sep-2016 18:29 | Kavacky | Updated [Embed code] |
| 19-Sep-2016 18:32 | Kavacky | Updated [Embed code] |
| 25-Aug-2020 12:28 | KagurazakaHanayo | Updated [Time, Source, Narrative] |
| 25-Aug-2020 12:28 | harro | Updated [Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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