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Delta Air Lines Boeing 767-400ER Returns to Service After Mid-Flight Engine Shutdown

Delta Air Lines Boeing 767-400ER Diverts After Engine Failure Mid-Flight
A Delta Air Lines flight from New York to London Heathrow was compelled to divert to Boston Logan International Airport on Friday, September 26, following a loss of power in the aircraft’s left engine. Flight DL1, carrying 250 passengers, declared an emergency and safely landed in Boston, underscoring ongoing operational challenges faced by the carrier.
The incident occurred approximately 120 nautical miles east of Boston when the crew of the 24-year-old Boeing 767-400ER (registration N840MH) detected a significant power loss in the left engine. In response, the pilots initiated a descent and executed a drift-down procedure, a standard protocol when an aircraft cannot maintain altitude on a single engine. Subsequently, the affected engine was shut down, and the flight was diverted to the nearest major airport. Emergency services were on standby upon arrival, and all passengers disembarked without injury.
Originally departing from New York John F. Kennedy International Airport at 21:05, the aircraft was scheduled to arrive in London the following morning. After declaring the emergency, the plane landed on runway 33L at Boston Logan approximately 45 minutes later. Emergency crews conducted inspections for brake overheating before the aircraft was towed to the apron, where it remained overnight for comprehensive maintenance evaluation.
Maintenance Response and Operational Impact
Delta’s maintenance team undertook a detailed assessment to verify the aircraft’s airworthiness, leading to the cancellation of the return flight DL2 from London to New York. Passengers affected by this cancellation were rebooked on alternative flights. The Boeing 767-400ER was cleared to return to service the following day, repositioning to JFK as flight DL9967 before resuming its scheduled operations on September 28 with flight DL742 from New York to Los Angeles.
This engine shutdown incident occurs amid heightened scrutiny of Delta Air Lines’ operational reliability and safety. The airline is currently engaged in a large-scale project to replace auxiliary power units on over 300 aircraft due to concerns over toxic fumes, a process that has placed additional demands on maintenance resources and operational focus. Such technical issues may provoke passenger apprehension and attract regulatory attention, while competitors might leverage these events to highlight their own safety records and operational strengths.
Delta has not issued an immediate comment regarding the incident. The Federal Aviation Administration and other regulatory authorities are expected to conduct a standard review of the event.
Despite the disruption, Delta’s prompt and effective handling of the emergency ensured passenger safety and limited further operational impact. The affected Boeing 767-400ER, delivered in 2001 and now over 24 years old, has since returned to regular service.

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