DGCA Issues Advisory on Potential Risks in Boeing 737 Rudder Control Systems

Overview of the Advisory

The Directorate General of Civil Aviation (DGCA) has raised alarms regarding the potential risks associated with the rudder control systems in Boeing 737 aircraft. The civil aviation regulator has issued a mandatory advisory to all operators of Boeing 737 jets to heed safety instructions stemming from a US investigation.

Key Safety Measures Recommended

• Operators must inform flight crews about the hazards of rudder control system jamming.
• Airlines need to ensure that crew members refer to the Quick Reference Handbook for handling rudder issues.
• Training exercises simulating jammed rudder scenarios must be included in recurrent training.

Concerns Raised by the US Report

The advisory follows an investigation by the US National Transportation Safety Board (NTSB), which highlighted safety concerns in specific Boeing 737 models equipped with Collins Aerospace actuators. It warned that moisture could accumulate and freeze, potentially causing ruddder control malfunction during flight.

Affected Airlines and Procedures

Air India Express, SpiceJet, and Akasa airlines, which operate Boeing 737 aircraft, are particularly impacted. They are required to adapt their flight training protocols to include specific exercises related to the rudder control system. These interim measures will ensure that crews are prepared for any issues that may arise until further instructions are provided by Boeing and other aviation authorities.

Future Actions and Monitoring

The DGCA is expected to collaborate with Boeing to develop long-term safety strategies. Until then, operations involving ‘Category III B’ landings for affected aircraft are suspended.