BOEING 737-9
Portland, OR — January 6, 2024
Event Information
| Date | January 6, 2024 |
| Event Type | ACC |
| NTSB Number | DCA24MA063 |
| Event ID | 20240106193617 |
| Location | Portland, OR |
| Country | USA |
| Coordinates | 45.45417, -122.75555 |
| Highest Injury | MINR |
Aircraft
| Make | BOEING |
| Model | 737-9 |
| Category | AIR |
| FAR Part | 121 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | NITE |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 8 |
| None | 172 |
| Total Injured | 8 |
Probable Cause
the in-flight separation of the left mid exit door (MED) plug due to Boeing Commercial Airplanes’ failure to provide adequate training, guidance, and oversight necessary to ensure that manufacturing personnel could consistently and correctly comply with its parts removal process, which was intended to document and ensure that the securing bolts and hardware that were removed from the left MED plug to facilitate rework during the manufacturing process were reinstalled. Contributing to the accident was the Federal Aviation Administration’s ineffective compliance enforcement surveillance and audit planning activities, which failed to adequately identify and ensure that Boeing addressed the repetitive and systemic nonconformance issues associated with its parts removal process.
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.