Runway excursion Serious incident McDonnell Douglas DC-9-83 (MD-83) SU-BOZ,

ASN Wikibase Occurrence # 322159

This record has been locked for editing.

Date:	Friday 23 June 2006
Time:	13:30
Type:	McDonnell Douglas DC-9-83 (MD-83)
Owner/operator:	Sudan Airways
Registration:	SU-BOZ
MSN:	53192/2155
Year of manufacture:	1996
Total airframe hrs:	22931 hours
Engine model:	Pratt & Whitney JT8D-219
Fatalities:	Fatalities: 0 / Occupants: 24
Aircraft damage:	Substantial, repaired
Category:	Serious incident
Location:	Juba Airport (JUB) - South Sudan
Phase:	Landing
Nature:	Passenger - Scheduled
Departure airport:	Nairobi-Jomo Kenyatta International Airport (NBO/HKJK)
Destination airport:	Juba Airport (JUB/HSSJ)
Investigating agency:	AAICD
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
The MD-83, wet leased by Sudan Airways, was on a scheduled flight from Khartoum to Juba and Nairobi and back. On its return flight from Nairobi, it landed Juba Airport. The weather condition convoyed to the aircraft by Juba ATC was: wind 180/03 Kt., temperature 31 C, dew point 22 C, visibility 10 Km, QNH 1014.
The aircraft landed runway 31 at a speed of 130 kts with reverse being immediately deployed. The touch down point was 752 meters beyond the runway 31 threshold. Five seconds after touch down the left wing spoilers suddenly returned to the stowed position and aircraft entered into a lateral acceleration condition. The aircraft managed to decelerate to 48 knots, then speed started to increase gradually. Forty eight seconds after touch down the PIC felt that the aircraft might not come to a full stop and he deployed the reversers once again and aircraft speed increased rolling in a curved path to the right and came to total stop about 360 meters (1181 feet) beyond the runway with the left wing touching the muddy ground and a retracted nose and left landing gear.

Cause of the Serious Incident:
Late touch down point down sloped R/W 31, reduced brake effect and imposed lateral acceleration that puzzled the PIC and attracted his attention to counteract the unexpected phenomena is the main reason to this serious incident.
Poor maintenance and improper before flight and landing checks are considered to be a contributory factor to this serious incident.

Accident investigation: