Aircraft Accident/Incident Report

Los Angeles, California
Thursday, August 16, 2007 12:57 PDT

NTSB Narrative Summary Released at Completion of Accident

On August 16, 2007, at approximately 1257 Pacific daylight time, a runway incursion occurred involving West Jet (WJA) 900, B737 and Northwest Airlines (NWA) flight 180, an A320, at Los Angeles International Airport, Los Angeles, California. WJA900 landed on runway 24R and exited at taxiway Y then changed to ground control frequency without authorization while the airplane was holding between the parallel runways. The tower controller cleared NWA180 for takeoff from runway 24L. Meanwhile, the pilot of WJA900 contracted ground control and said, "Ground, WJA900 with you on reverse [taxiway] yankee for gate 35." The ground controller believed that the tower controller had instructed the flight to cross runway 24L and responded, "WJA900, Los Angeles tower, taxi [via taxiway] echo to the gate." Ten seconds later, the pilot of WJA900 confirmed that the flight was cleared to cross runway 24L. The ground controller asked who called and the pilot again asked whether or not they were cleared to cross the runway. The ground controller then realized that WJA900 had not been instructed to cross runway 24L and told WJA900 to stop. According to the FAA and WJA, the airplane crossed the hold short line but did not enter the runway. According to the FAA, the two aircraft missed colliding by 37 feet (wingtip of A320 to the nose of the B737) as NWA180 departed runway 24L. The Airport Movement Area Safety System (AMASS) activated on this incident.

NTSB Probable Cause Narrative

The LAX north ground controller's failure to properly coordinate with the tower local controller prior to providing taxi instructions that permitted an aircraft to cross an active runway while another aircraft was departing. **This report was modified on December 12, 2007.**

Event Information

Type of Event Incident
Event Date 8/16/2007
Event Day of the Week Thursday
Time of Event 1257
Event Time Zone Pacific Daylight Time
Event City Los Angeles
Event State CALIFORNIA
Event Country --
Zipcode of the event site --
Event Date Year 2007
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude --
Event Location Longitude --
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport --
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID KLAX
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions --
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 8
Air Temperature at event time (in degrees celsius) 22
Dew Point at event time (in degress fahrenheit) 16
Wind Direction (degrees magnetic) 230
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 10
Wind Velocity Indicator --
Wind Gust Indicator Unknown
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.93
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 296
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 22762
NTSB Notification Source FAA
NTSB Notification Date Aug 17 2007 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Nov 30 2007 3:42PM
User who most recently changed record NTSB\lema
Basic weather conditions Visual Meteorological Cond
FAA District Office HQ

Aircraft Involved

Aircraft #1

Aircraft #2

Aircraft Registration Number -- --
NTSB Number OPS07IA009A OPS07IA009B
Missing Aircraft Indicator -- --
Federal Aviation Reg. Part -- --
Type of Flight Plan filed IFR IFR
Flight plan Was Activated? Yes Yes
Damage None None
Aircraft Fire None --
Aircraft Explosion None --
Aircraft Manufacturer's Full Name Boeing Airbus Industrie
Aircraft Model 737-700 A320
Aircraft Series Identifier -- --
Aircraft Serial Number -- --
Certified Max Gross Weight -- --
Aircraft Category Airplane Airplane
Aircraft Registration Class -- --
Aircraft is a homebuilt? No No
Flight Crew Seats -- --
Cabin Crew Seats -- --
Passenger Seats -- --
Total number of seats on the aircraft -- --
Number of Engines -- --
Fixed gear or retractable gear Fixed Fixed
Aircraft, Type of Last Inspection -- --
Date of Last Inspection -- --
Airframe hours since last inspection -- --
Airframe Hours -- --
ELT Installed -- --
ELT Activated -- --
ELT Aided Location of Event Site -- --
ELT Type -- --
Aircraft Owner Name -- --
Aircraft Owner Street Address -- --
Aircraft Owner City -- --
Aircraft Owner State -- --
Aircraft Owner Country -- --
Aircraft Owner Zipcode -- --
Operator is an individual? -- --
Operator Name -- --
Operator Same as Owner? -- --
Operator Is Doing Business As -- --
Operator Address Same as Owner? -- --
Operator Street Address -- 5101 Northwest Drive
Operator City -- St. Paul
Operator State -- MN
Operator Country CA USA
Operator Zip code -- 55111
Operator Code DTYA MR5D
Owner has at least one certificate -- --
Other Operator of large aircraft? -- --
Certified for Part 133 or 137 Operation -- --
Operator Certificate Number -- --
Indicates whether an air carrier operation was scheduled or not Scheduled Scheduled
Indicates Domestic or International Flight International Domestic
Operator carrying Pax/Cargo/Mail Passenger Only Passenger Only
Type of Flying (Per_Bus / Primary) -- --
Second Pilot on Board -- --
Departure Point Same as Event No Yes
Departure Airport Code YYC KLAX
Departure City CALGARY ALTA Los Angeles
Departure State -- CA
Departure Country CA USA
Departure Time -- --
Departure Time Zone -- PDT
Destination Same as Local Flt crash at destination city --
Destination Airport Code KLAX MEM
Destination City Los Angeles MEMPHIS
Destination State CA TN
Destination Country USA USA
Specific Phase of Flight Taxi - from landing Takeoff - roll/run
Report sent to ICAO? -- --
Evacuation occurred -- --
Date of most recent change to record Nov 21 2007 10:34AM Nov 21 2007 10:34AM
User who most recently changed record ROWS ROWS
Since inspection or accident -- --
Event Location Runway Number and Location -- --
Runway Length -- --
Runway Width -- --
Sight Seeing flight No No
Air Medical Flight No No
Medical Flight -- --