ASN logo
Accident description
Last updated: 18 October 2017
Status:Final
Date:Tuesday 10 May 2005
Time:19:36
Type:Silhouette image of generic DC95 model; specific model in this crash may look slightly different
McDonnell Douglas DC-9-51
Operator:Northwest Airlines
Registration: N763NC
C/n / msn: 47716/832
First flight: 1976
Total airframe hrs:67268
Cycles:66998
Engines: 2 Pratt & Whitney JT8D-17
Crew:Fatalities: 0 / Occupants: 5
Passengers:Fatalities: 0 / Occupants: 94
Total:Fatalities: 0 / Occupants: 99
Airplane damage: Damaged beyond repair
Location:Minneapolis-St Paul International Airport, MN (MSP) (   United States of America)
Phase: Taxi (TXI)
Nature:Domestic Scheduled Passenger
Departure airport:Columbus-Port Columbus International Airport, OH (CMH/KCMH), United States of America
Destination airport:Minneapolis-St. Paul International Airport, MN (MSP/KMSP), United States of America
Flightnumber:1495
Narrative:
Northwest Flight 1495 departed Columbus (CMH) at 18:26 on a flight to Minneapolis (MSP). The flight was carried out by DC-9-51 N763NC. After takeoff, at some point below 4,000 feet altitude, when the slats were retracted, the MASTER CAUTION light illuminated. The co-pilot, who was pilot flying, observed the RUDDER CONTROL MANUAL annunciator light and then saw that the right hydraulic system pressure was about 1,000 pounds per square inch (PSI). The right engine hydraulic pump switch was selected to 'off' and the flight was continued while the captain referred to the NWA DC-9 Cockpit Operating Manual (COM) to complete the procedures. He also discussed the problem with maintenance control on the ground. The approach and landing at Minneapolis were briefed thoroughly. Approximately 18:50, the captain contacted dispatch to request that they "call out the trucks" for their arrival. At 19:01 the captain radioed to MSP center "ah we got a hydraulic problem, we're gonna go ahead and declare an emergency. ah everything should be okay but just gonna have to land a little faster and we're gonna have the trucks standing and everything." The landing gear was extended early in the approach because the crew was uncertain if they would have to use the Emergency Gear Extension Handle. This was not necessary as the gear extended successfully. The first officer flew a long slow downwind from Farmington to a downwind leg to runway 22. He turned onto the localizer course at an altitude about 3,000 feet. The flight was then cleared for the approach to runway 22. A safe landing was carried out at 19:23. After landing the flaps were retracted and the After Landing checklist was completed. The crew received taxi instructions, and after crossing runway 30L, he made a right turn onto taxiway A. They made a slight gradual turn into the gate area. He had just started to turn into the gate from taxiway A when the nose wheel steering failed. The first officer then advised Ground Control that they were experiencing steering problems and would probably have to be towed to the gate. He then called MAINT and told them the same thing. Then the captain
lost the brakes. The first officer stated that he saw the captain's hands "come up" and apply reverse thrust. The airplane came to a stop. The first officer stated that he called maintenance again and told them that they had lost steering and brakes and that they needed to have the airplane chocked. maintenance asked if they would shut down the engines and the captain said, no, he needed them first officer the reversers. The first officer stressed that they needed to get somebody out there right away; they were in a very precarious situation. maintenance said they would have somebody out as soon as they could. The first officer made a PA announcement to the passengers telling them that the airplane was experiencing a system malfunction; they were going to stay put and then be towed to the gate. At 19:36 they began to slowly roll forward. The captain tried using the engine reverse thrust to stop the airplane, but the thrust reversers did not deploy. As the DC-9 started moving towards a Northwest Airlines A.319 (N368NB) and impacted the A.319 with a speed of approximately 16 mph. The DC-9 hit the aft part of the A.319 right wing after sliding under its horizontal stabilizer.

Probable Cause:

PROBABLE CAUSE: "The Captain's decision to shutdown the left engine during taxi with no hydraulic pressure on the right side hydraulic system to effectively operate the brakes, steering, or thrust reversers. A factor was the fatigue fracture of the rudder shutoff valve which resulted in the loss of right side hydraulic pressure."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 12 months
Accident number: CHI05MA111A
Download report: Summary report

Classification:
Ground collision

Sources:
» NTSB id CHI05MA111A


Follow-up / safety actions
Following the accident, the airplane manufacturer issued a service letter pertaining to the replacement of the rudder shutoff valve based upon reliability information that was reported to them.

Photos

photo of McDonnell Douglas DC-9-51 N763NC
photo of McDonnell Douglas DC-9-51 N763NC
photo of McDonnell Douglas DC-9-51 N763NC
photo of McDonnell Douglas DC-9-51 N763NC
photo of McDonnell Douglas DC-9-51 N763NC
photo of McDonnell Douglas DC-9-51 N763NC
Add your photo of this accident or aircraft
 

Video, social media

Aircraft history
date registration operator remarks
16 SEP 1976 N763NC North Central Airlines
01 JUL 1979 N763NC Republic Airlines airline merged
01 OCT 1986 N763NC Northwest Airlines airline merged

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 Columbus-Port Columbus International Airport, OH to Minneapolis-St. Paul International Airport, MN as the crow flies is 998 km (624 miles).

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.
languages: languages

Share

DC-9-50

  • 96 built
  • 3rd loss
» safety profile