SAS B736 at Helsingborg on Apr 6th 2014, temporary runway excursion on landing

Last Update: November 3, 2014 / 13:58:42 GMT/Zulu time

Bookmark this article

Photo of SAS Scandinavian Airlines LN-RRY, Boeing 737-600 — SAS Scandinavian Airlines LN-RRY, Boeing 737-600 (Photo credit: Ronnie Macdonald / Flickr / License: CC by)

Incident Facts

Date of incident
Apr 6, 2014

Classification
Incident

Airline
SAS Scandinavian Airlines

Flight number
SK-187

Departure
Stockholm, Sweden

Destination
Helsingborg, Sweden

Aircraft Registration
LN-RRY

Aircraft Type
Boeing 737-600

ICAO Type Designator
B736

Airport
Ängelholm-Helsingborg Airport, Ängelholm

Airport ICAO Code
ESTA

A SAS Scandinavian Airlines Boeing 737-600, registration LN-RRY performing flight SK-187 from Stockholm to Helsingborg (Sweden), landed on Helsingborg's runway 14 at 22:47L (20:47Z), however, the left hand main gear exited the left edge of the runway temporarily. The aircraft rolled out without further incident.

Sweden's Statens Haverikommission rated the occurrence a serious incident and opened an investigation on Apr 9th 2014.

Ängelholm/Helsingborg Airport features a runway 14/32 of 1945 meters/6380 feet length.

Sweden's Statens Haverikommission (SAIB) released their final report in Swedish with English summary concluding the probable causes of the incident was:

The crew was most likely subjected to a Black-hole approach illusion that made it difficult to timely detect and correct the aircraft's drift.

The first officer (29, CPL, 2,222 hours total, 2,018 hours on type) was pilot flying, the captain (49, ATPL, 13,304 hours total, 3,319 hours on type) was pilot monitoring while the aircraft was on an automatic coupled ILS approach to runway 14, the cloud base was at 300 feet, surface winds were at 4 knots from 160 degrees, at 200 feet AGL the winds were at 10 knots from 208 degrees, visibility was 1300 meters in moderate drizzle.

After the first officer became visual with the approach and runway edge lights he disconnected the autopilot and continued the landing manually. According to QAR data the aircraft crossed the runway threshold about 10 meters to the right of the runway center line, subsequently crossed the center line diagonally, the captain assisted with maneouvering the aircraft and the aircraft returned to the center line however not before the left main gear had contacted and damaged two runway left edge lights. The aircraft sustained no damage.

The SAIB summarized the crew interviews: "The flight crew has explained during interviews that although the runway edge lights could be seen, it was difficult to see the surface of the runway and the runway markings. The Commander has also explained that there were no distinct references."

Metars:
ESTA 062150Z AUTO 16004KT 1600 OVC002/// 10/10 Q1012 REDZ=
ESTA 062120Z AUTO 15004KT 0900 R14/P1500N R32/P1500N -DZ OVC002/// 10/10 Q1012=
ESTA 062050Z 16004KT 1000 R14/P1500N R32/P1500N DZ BKN003 OVC005 10/10 Q1012=
ESTA 062020Z 16004KT 0800 R14/P1500N R32/P1500N DZ OVC002 10/10 Q1012=
ESTA 061950Z 16005KT 1000 R14/P1500N R32/P1500N BR OVC003 10/09 Q1012=
ESTA 061920Z 16005KT 2600 BR OVC005 10/09 Q1012=
ESTA 061850Z 16005KT 2500 BR OVC006 10/09 Q1012=