Investigation Summary
On November 12, 2013, Southwest Airlines Flight 3426 was descending toward Raleigh-Durham when the crew received a maintenance alert indicating a potential issue with the cabin pressurization system. Following standard operating procedures for a loss of cabin pressure, the flight crew initiated a 'Rapid Descent'—a controlled but steep maneuver designed to reach a breathable altitude of 10,000 feet as quickly as possible. During this high-workload phase, the captain attempted to use the interphone to brief the flight attendants on the situation. However, he inadvertently selected the Public Address (PA) toggle, broadcasting his intent to the entire cabin. His statement, 'We're going down,' was intended to describe the planned descent to 10,000 feet but was interpreted by passengers as an impending crash. The sensation of the rapid descent, which passengers described as a 'nosedive,' compounded the panic. The aircraft leveled off at a safe altitude, the pressurization issue was stabilized, and the flight landed normally at RDU. The FAA's subsequent probe focused on the human factors of cockpit-to-cabin communication during emergency procedures.
Final Conclusions
The incident was concluded to be the result of a technical maintenance alert regarding cabin pressure, compounded by a human factors error in cockpit-to-cabin communication. While the aircraft's descent was a standard and controlled response to a pressurization issue, the accidental PA broadcast caused unnecessary distress. The FAA categorized the event as an operational incident, and Southwest Airlines issued a formal apology for the confusion caused by the pilot's announcement.
Video Analysis
No video analysis linked for this case file yet.
Systems & Failure Modes
Cabin Pressurization System
The system responsible for maintaining a safe and comfortable atmospheric pressure for occupants at high altitudes; a maintenance alert in this system prompted the descent.
Public Address (PA) System
The electronic sound amplification and distribution system used by the crew to communicate with passengers; a switch error caused a private crew communication to be broadcast publicly.
Interesting Facts
- 01The aircraft was carrying 96 passengers and 5 crew members, totaling 101 souls on board.
- 02The incident was triggered by a maintenance alert regarding the cabin pressurization system.
- 03The pilot inadvertently broadcasted a message intended for the crew over the passenger public address system.
- 04Passengers reported a 'nosedive' sensation during the controlled descent to a lower altitude.
- 05The aircraft landed safely at Raleigh-Durham International Airport (RDU) without further incident.
- 06The FAA investigated the event as an operational incident focusing on communication errors.
Safety Actions & Advisories
ADREP Reporting
The incident data was integrated into the FAA and ICAO safety databases to facilitate the exchange of safety information and prevent future occurrences.
Location
ACCIDENT SITE · Coordinates taken from the airport reference point.