Narrative:
SAS flight 2748, a DHC-8-402Q Dash 8, took off from Copenhagen, Denmark, on a flight to Palanga, Lithuania. The flight proceeded uneventfully until the final approach to Palanga. At an altitude of 2000 feet, the flight crew selected the landing gear down. However, the right-hand main gear extended but did not lock down and the landing gear doors did not close. The approach was aborted and the aircraft was positioned for another approach. The landing gear was recycled, but the warning remained.
The flight crew decided to divert to Vilnius Airport. Before landing at Vilnius, another attempt was made to release the undercarriage using a backup system, but the undercarriage control panel still showed unsafe the same warnings.
The no.2 (right) engine was shut down and the propeller was feathered prior to landing at Vilnius. When the plane touched down, right-hand main gear automatically retracted after a second. The no.1 engine was shut down and the aircraft slid off the side of the runway and stopped about 40 m to the right of the runway at 1150 m from the runway threshold.
Cause
The aircraft accident was caused by the separation of the piston rod of the extension/retraction actuator from the rod end during right hand main landing gear extension due to thread connection corrosion. The freely falling landing gear broke the apex hinge lugs of the stabilizer sections, the right hand landing gear did not lock in the extended position and collapse occurred when the aircraft was rolling after landing.
Forced landing on runway
accident date: 12-09-2007
type: de Havilland Canada DHC-8-402 Q400
registration: LN-RDS
accident date: 12-09-2007
type: de Havilland Canada DHC-8-402 Q400
registration: LN-RDS
accident date: 12-09-2007
type: de Havilland Canada DHC-8-402 Q400
registration: LN-RDS
| Status: | Accident investigation report completed and information captured |
| Date: | Wednesday 12 September 2007 |
| Time: | 01:36 |
| Type: |  de Havilland Canada DHC-8-402Q Dash 8 |
| Operator: | Scandinavian Airlines System - SAS |
| Registration: | LN-RDS |
| MSN: | 4035 |
| First flight: | 2001 |
| Total airframe hrs: | 11366 |
| Cycles: | 14224 |
| Engines: | 2 Pratt & Whitney Canada PW150A |
| Crew: | Fatalities: 0 / Occupants: 4 |
| Passengers: | Fatalities: 0 / Occupants: 48 |
| Total: | Fatalities: 0 / Occupants: 52 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Written off (damaged beyond repair) |
| Location: | Vilnius Airport (VNO) ( Lithuania)
|
| Phase: | Landing (LDG) |
| Nature: | International Scheduled Passenger |
| Departure airport: | København-Kastrup Airport (CPH/EKCH), Denmark |
| Palanga Airport (PLQ/EYPA), Lithuania | |
| Flightnumber: | SK2748 |
SAS flight 2748, a DHC-8-402Q Dash 8, took off from Copenhagen, Denmark, on a flight to Palanga, Lithuania. The flight proceeded uneventfully until the final approach to Palanga. At an altitude of 2000 feet, the flight crew selected the landing gear down. However, the right-hand main gear extended but did not lock down and the landing gear doors did not close. The approach was aborted and the aircraft was positioned for another approach. The landing gear was recycled, but the warning remained.
The flight crew decided to divert to Vilnius Airport. Before landing at Vilnius, another attempt was made to release the undercarriage using a backup system, but the undercarriage control panel still showed unsafe the same warnings.
The no.2 (right) engine was shut down and the propeller was feathered prior to landing at Vilnius. When the plane touched down, right-hand main gear automatically retracted after a second. The no.1 engine was shut down and the aircraft slid off the side of the runway and stopped about 40 m to the right of the runway at 1150 m from the runway threshold.
Probable Cause:
Cause
The aircraft accident was caused by the separation of the piston rod of the extension/retraction actuator from the rod end during right hand main landing gear extension due to thread connection corrosion. The freely falling landing gear broke the apex hinge lugs of the stabilizer sections, the right hand landing gear did not lock in the extended position and collapse occurred when the aircraft was rolling after landing.
Accident investigation:
 |
|
Classification:
Landing gear collapseForced landing on runway
Sources:
» SAS Media release 12-9-2007Follow-up / safety actions
The entire SAS fleet of DHC-8-400 planes was grounded as of September 12 following two similar accidents on September 9 and 12. Following an extensive inspection program and parts replacement (actuators in the main landing gear),
SAS began returning planes to service as of October 4, 2007. All aircraft were back in service on October 14, 2007. FAA issued 1 Airworthiness Directive
TC issued 1 Airworthiness Directive
Show all...
SAS began returning planes to service as of October 4, 2007. All aircraft were back in service on October 14, 2007. FAA issued 1 Airworthiness Directive
TC issued 1 Airworthiness Directive
Show all...
Photos
accident date: 12-09-2007
type: de Havilland Canada DHC-8-402 Q400
registration: LN-RDS
accident date: 12-09-2007
type: de Havilland Canada DHC-8-402 Q400
registration: LN-RDS
accident date: 12-09-2007
type: de Havilland Canada DHC-8-402 Q400
registration: LN-RDS
Video, social media
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from København-Kastrup Airport to Palanga Airport as the crow flies is 525 km (328 miles).
Accident location: Approximate; accuracy within a few kilometers.
Distance from København-Kastrup Airport to Palanga Airport as the crow flies is 525 km (328 miles).
Accident location: Approximate; accuracy within a few kilometers.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2023 Flight Safety Foundation