AMSTERDAM- KLM Royal Dutch Airlines (KL) returned a Boeing 787-10 Dreamliner to its home base on Tuesday (May 12, 2026) after the right engine bleed air system failed during the westbound oceanic phase. The aircraft, operating flight KL643 from Amsterdam Schiphol Airport (AMS) to New York John F. Kennedy International Airport (JFK), turned back over Irish airspace before reaching the North Atlantic Tracks.

The six-year-old Dreamliner, registered PH-BKF, departed Amsterdam Schiphol Airport (AMS) on schedule and climbed to flight level 360. Approximately 1 hour and 45 minutes into the flight, the crew elected to abandon the crossing and route back to Schiphol Airport (AMS) for technical attention.

KLM New York Flight with 787 Makes U-turn to Amsterdam, Here's WhyKLM New York Flight with 787 Makes U-turn to Amsterdam, Here's WhyPhoto:Acroterion | Wikimedia Commons
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KLM New York Flight Returns to Amsterdam

Onboard maintenance data recorded an EICAS status message reading “ENG BAI VALVE CLSD R,” indicating that the right engine Bleed Air Inlet valve had closed and could not be reopened. The fault falls under the ATA chapter 75-11, which covers engine bleed air on the Boeing 787-10.

Flight Deck Effects logs captured supporting messages on both Channel A and Channel B of the right engine Electronic Engine Control (EEC), along with entries on the Wing Anti-Ice Control Position System (WAICPS), the Bus Power Control Unit (BPCU), and the Equipment Cooling system. These secondary indications are consistent with a loss of bleed supply from the right side, which feeds wing anti-ice, cabin pressurization, and the air conditioning packs on that side.

The crew first cycled the bleed air switch to clear the fault. A subsequent ACARS message sent to KLM dispatch in Dutch read “BAI GESCHAKELD. SITUATIE ONVERANDERD HELAAS,” translating to “BAI switched, situation unchanged unfortunately.” The flight crew then coordinated the return with KLM operations and air traffic control.

KLM Royal Dutch Airlines (KL) returned a Boeing 787-10 Dreamliner to its home base on Tuesday after the right engine bleed air system failed during the westbound oceanic phase.KLM Royal Dutch Airlines (KL) returned a Boeing 787-10 Dreamliner to its home base on Tuesday after the right engine bleed air system failed during the westbound oceanic phase.Photo: FlightRadar24

Flight KL643 Profile and Turnaround Point

KL643 departed Amsterdam Schiphol Airport (AMS) on its scheduled long-haul service and tracked westbound across the United Kingdom toward the oceanic entry point. Position reports placed the Boeing 787-10 at flight level 360 over Irish airspace as it prepared for the Atlantic crossing.

The Dreamliner reached its westernmost position near 53.7 degrees North and 9.0 degrees West, roughly abeam the west coast of Ireland, before banking into a 180-degree turn. From that point, the aircraft tracked eastbound at Mach 0.85, with revised ACARS flight plan data updating the destination from KJFK back to EHAM.

The new flight plan listed an ILS 27 approach into Amsterdam via the LAMSO 2A standard arrival route. The flight was projected to touch down at Schiphol Airport (AMS) at approximately 20:10 local time.

KLM New York Flight with 787 Makes U-turn to Amsterdam, Here's WhyKLM New York Flight with 787 Makes U-turn to Amsterdam, Here's WhyPhoto: Adam Moreira (AEMoreira042281) | WIkimedia Commons
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Aircraft Background

PH-BKF is a Boeing 787-10 Dreamliner operated by KLM Royal Dutch Airlines (KL) and powered by General Electric GEnx engines. The aircraft forms part of the carrier’s long-haul widebody fleet alongside the Boeing 777 and Airbus A330.

Earlier on the same day, the same airframe had completed an inbound rotation from Los Angeles International Airport (LAX) to Amsterdam Schiphol Airport (AMS) as flight KL604, arriving in the morning hours. The KL643 service to New York JFK was its next scheduled assignment, with no prior indication of technical fault during the preceding flight.

KLM Boeing 787KLM Boeing 787Photo: Aero Icarus | Flickr

Operational Implications of a Bleed Air Loss

On the Boeing 787-10, a closed bleed air inlet valve removes one of two engine bleed sources available to the aircraft systems.

Under Extended-range Twin-engine Operational Performance Standards (ETOPS), continuing a transatlantic crossing with a degraded bleed configuration is generally not permitted, since the affected side loses redundancy for cabin pressurization and wing anti-ice protection.

KLM Royal Dutch Airlines (KL) bases its primary heavy maintenance and engineering capability at Amsterdam Schiphol Airport (AMS). The decision to return to home base, rather than divert to Shannon Airport (SNN) or Dublin Airport (DUB), reflects standard airline practice when fuel state, aircraft performance, and weather conditions allow the longer return. The choice also simplifies passenger rebooking and aircraft rectification.

KLM has not issued a public statement on the specific defect at the time of writing. Affected passengers were expected to be rebooked onto the next available services to New York JFK from Amsterdam Schiphol Airport (AMS).

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