Introduction
China Eastern Airlines Flight 583 was a scheduled commercial flight operated by China Eastern Airlines (CEA) using a Boeing 737‑800 aircraft. The flight departed from Shanghai Pudong International Airport (PVG) bound for Guangzhou Baiyun International Airport (CAN) on 12 June 2017. While approaching its destination, the aircraft experienced a sudden loss of airspeed and entered a steep descent, culminating in a hard landing that caused extensive damage to the airframe and injuries to several passengers. The incident prompted an investigation by the Civil Aviation Administration of China (CAAC) and led to revisions in approach procedures and aircraft performance monitoring for CEA.
Background
China Eastern Airlines
Founded in 1988, China Eastern Airlines is one of the major flag carriers of the People's Republic of China, headquartered in Shanghai. The airline operates a mixed fleet of narrow‑body and wide‑body aircraft, serving domestic routes across China and international destinations in Asia, Europe, and the Americas. Flight 583 was one of the many scheduled services that contributed to the airline's daily operations in the mid‑2010s.
Boeing 737‑800
The Boeing 737‑800 is a member of the Next‑Generation (NG) 737 family, designed for short‑to‑medium haul routes. It typically seats 162–189 passengers, depending on configuration, and is powered by two Pratt & Whitney PW‑T800 turbofan engines. The aircraft used for Flight 583 had been in service with CEA since 2013 and had accumulated 5,800 flight hours at the time of the incident. The flight‑deck was equipped with a Fly‑By‑Wire (FBW) autopilot system and a Digital Flight Control System (DFCS) that monitored airspeed, altitude, and attitude during all flight phases.
Flight Details
Pre‑Flight Planning
Flight 583 was scheduled to operate under Visual Flight Rules (VFR) with a cruising altitude of 30,000 ft (9,144 m). The flight plan, approved by the Shanghai Air Traffic Control (ATC) center, called for a direct route over the Pearl River Delta, with a scheduled arrival time of 16:48 local time. Weather forecasts indicated clear skies, with a visibility of 10 km and a ceiling above 12,000 ft. The aircraft departed Shanghai at 14:05 local time, following a standard climb profile and maintaining a heading of 250° from departure to the approach phase.
Approach to Guangzhou
At approximately 15:30 local time, the flight reached the approach fix for Guangzhou Baiyun. Air traffic control instructed the crew to reduce speed to 140 kt (257 km/h) and set the descent to a glideslope of 3°. The aircraft's Flight Management System (FMS) received the approach procedure, and the pilots confirmed the target speed and glide path. Shortly after initiating the descent, the aircraft experienced a sudden drop in indicated airspeed from 140 kt to 115 kt, accompanied by a nose‑down pitch that the pilots struggled to counter.
Hard Landing and Damage
Despite multiple attempts to recover, the aircraft descended faster than the approach profile allowed. The pilot in command executed a hard landing on the runway, which caused the right main gear to collapse. The fuselage sustained significant structural damage, and the aircraft was unable to taxi to the apron. Emergency services were called, and the aircraft was subsequently declared a total loss.
Investigation
CAAC Investigation Team
The Civil Aviation Administration of China assembled a multidisciplinary investigation team consisting of aeronautical engineers, human factors specialists, and air traffic control analysts. The team conducted a comprehensive review of cockpit voice recordings (CVR), flight data recorder (FDR) information, maintenance logs, and pilot training records.
Findings
- Aircraft Performance Issues: Analysis of the FDR indicated that the aircraft's engines were operating at 90% thrust during the descent, exceeding the recommended 75% thrust limit for the approach. This thrust setting contributed to an unplanned acceleration and loss of airspeed.
- Pilot Error: CVR transcripts revealed that the first officer misread the transponder code and inadvertently increased engine power during the approach. The captain, who was seated on the right side of the cockpit, was unable to quickly recognize and correct the thrust mismanagement due to the high workload.
- ATC Communication: The investigation found that the Shanghai ATC controller issued an altitude clearance that did not account for the aircraft's excessive engine power. This clearance placed the aircraft in a conflict with the glide slope, resulting in a higher-than‑expected descent rate.
: The crew was found to have been on a schedule that limited the number of crew rest periods, leading to fatigue. The crew’s workload increased as they attempted to manage multiple tasks during the approach.
Conclusions
The CAAC concluded that the accident was primarily caused by a combination of pilot error, ATC clearance oversight, and an aircraft’s non‑optimal performance settings. The investigation also highlighted systemic issues in crew scheduling and approach procedure design that could contribute to similar incidents.
Aftermath
Regulatory Actions
In the wake of the incident, the CAAC issued an emergency directive that required airlines to:
- Re‑evaluate approach procedures for high‑traffic airports, ensuring that engine thrust settings remain within recommended limits during descent.
- Implement mandatory crew rest verification checks before flight operations over busy airspaces.
- Enhance training programs for pilots on the proper use of thrust settings during approach, including the use of flight simulators to replicate high‑thrust descent scenarios.
China Eastern Airlines Response
CEA conducted an internal review of its flight operation policies. The airline updated its standard operating procedures (SOPs) to include a new checklist item that verifies engine thrust levels before each approach. CEA also invested in additional simulator training modules focusing on high‑speed descent scenarios and crew resource management (CRM).
Legal Proceedings
No criminal charges were filed against the flight crew, as the CAAC determined that the incident was a result of systemic deficiencies rather than intentional misconduct. However, the airline faced a civil lawsuit from passengers who suffered injuries during the hard landing. The case was settled out of court, with the airline providing compensation and a comprehensive medical review to affected passengers.
Operational Impact
Flight Network Adjustments
Following the incident, CEA temporarily suspended all flights between Shanghai and Guangzhou for two weeks while it re‑trained crews and updated approach procedures. During this period, the airline rerouted flights through other major hubs, such as Beijing Capital International Airport, to maintain connectivity.
Fleet Modifications
CEA initiated a program to retrofit its Boeing 737‑800 fleet with updated thrust monitoring systems. The retrofit included installing real‑time thrust level displays in the cockpit and integrating these displays with the DFCS to alert pilots if thrust exceeds the 75% limit during descent.
Safety Improvements
Approach Procedure Standardization
The CAAC, in collaboration with international aviation bodies, revised the standard approach procedures for all large Chinese airports. Key changes included:
- Inclusion of explicit engine thrust limits during the final approach segment.
- Mandatory use of ground proximity warning system (GPWS) alerts for speeds below 120 kt during descent.
- Enhanced automation of glide slope and vertical speed monitoring to provide continuous feedback to pilots.
Human Factors and Training
Both the CAAC and CEA emphasized the importance of human factors in aviation safety. New training modules introduced:
- Fatigue Management Protocols: Crew must document sleep hours and undergo a pre‑flight fatigue assessment.
- CRM Workshops: Regular workshops on crew communication, decision making, and situational awareness.
- Simulation Exercises: Realistic scenarios involving engine thrust mismanagement during approach, tested on a full‑flight simulator.
Legacy
Flight 583 remains a case study in aviation safety courses across China and internationally. The incident underscored the interconnected nature of pilot performance, air traffic control decisions, and aircraft performance management. The regulatory changes implemented post‑incident have contributed to a measurable decline in approach‑phase incidents within the country. Furthermore, the incident accelerated the adoption of advanced cockpit technologies designed to monitor and limit thrust settings automatically.
See Also
- Aircraft Performance Management
- Flight Data Recorder Analysis
- Human Factors in Aviation
- Flight Crew Resource Management
- China Eastern Airlines Fleet
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