Incident Summary
On March 6, 2017, at about 1010 Pacific standard time, Delta Air Lines Flight 429, an Airbus A319-114 (registration N369NB), experienced an abrupt stop while taxiing for takeoff at Los Angeles International Airport (LAX), Los Angeles, California. The airplane was not damaged. Of the 117 passengers and crew onboard, one flight attendant was seriously injured. The regularly scheduled passenger flight was operating under 14 Code of Federal Regulations Part 121 from LAX to New Orleans International Airport (MSY), New Orleans, Louisiana.
Captain's Account
The captain reported that pushback, initial engine start, and taxi were normal. When the airplane was number 5 in line for takeoff, he started the second engine, then stopped the airplane in line and set the parking brake. He began the delayed after-start check when he noticed the airplane rolling. He verified that the parking brake was set, and as he applied the brakes, they locked, causing a jarring stop.
Flight Attendant Injury
At the time of the sudden stop, the lead flight attendant was performing safety checks in the first-class galley and was thrown into the galley. After being informed of the injury, the captain returned the flight to the gate, where paramedics met them. The flight attendant was transported to the hospital and diagnosed with a broken rib.
Post-Incident Examination
Maintenance personnel examined the airplane after the incident and found the circuit breaker for the parking brake electrical control valve had popped.