British Airways Dreamliner Window Malfunction on BA6

Passengers on British Airways flight BA6 faced 14 hours of unrelenting daylight when the Dreamliner’s electrochromic window dimming system failed on one side of the cabin, forcing the crew to use paper tray liners and tape as makeshift shades. Here’s how the high-tech solution unraveled and what it means for flyers on the world’s most advanced jetliner.

Flight: BA6 · Aircraft: Boeing 787-9 Dreamliner · Route: Tokyo Haneda → London Heathrow · Date: 26 April 2025 · Duration: 14 hours · Malfunction: Electronic window dimming system failure

Six key facts capture the incident in numbers:

How do Dreamliner windows work?

The Boeing 787 Dreamliner uses electrochromic dimming technology instead of traditional pull-down shades (Wikipedia (aviation encyclopedia)). A small electrical current changes the tint of the window pane, giving passengers five levels of darkness. There are no mechanical blinds – the system is controlled by a touch button below each window, and the crew can override all windows from the cabin panel.

How does electrochromic technology dim windows?

The glass contains a thin film that darkens when voltage is applied (Paddle Your Own Kanoo (travel news site)). In the clear state, the film is transparent. When the passenger adjusts the brightness, a small current moves ions between layers, changing the tint. While elegant in design, the system is known to be sensitive to electrical glitches, as the BA6 incident shows.

Can the pilot control all windows?

Yes, the flight crew has a master override that can set all windows to a single tint level or even lock them. However, the pilot cannot individually override a single window; the system is all-or-nothing for the entire cabin. On BA6, the malfunction was isolated to one side of the aircraft – suggesting a local electrical bus or wiring issue rather than a full system failure (One Mile at a Time (aviation blog)).

The implication: the absence of manual backup forces crews to improvise when technology fails.

What happened on British Airways flight BA6?

On 26 April 2025, British Airways flight BA6 departed Tokyo Haneda for London Heathrow aboard a Boeing 787-9 Dreamliner (Aviation A2Z (aviation news outlet)). According to One Mile at a Time (aviation blog), the crew already knew about the window dimming problem before pushback and tried to fix it with ground engineers. They were unsuccessful, so the aircraft took off with the malfunction on one side of the cabin.

When did the malfunction occur?

The problem was identified on the ground at Haneda. Travel and Tour World (travel industry news) reported that maintenance engineers attempted a repair but could not resolve the issue. The flight departed with the system still partially inoperative.

Which aircraft was involved?

The aircraft was a Boeing 787-9 Dreamliner, registration unknown but the type is common on long-haul BA routes. The 787-9 is the stretched version of the Dreamliner, configured with around 216 seats for BA (Paddle Your Own Kanoo).

What this means: even a minor system failure can severely degrade passenger comfort on a long-haul flight.

The Bottom line: A bit of quick thinking and a lot of tape got passengers to London, but the experience highlighted the vulnerability of a system that has no mechanical fallback.

How many 787 Dreamliner crashes have there been?

As of 2025, the Boeing 787 Dreamliner has not experienced any fatal crashes in commercial service (Wikipedia (aviation encyclopedia)). The aircraft entered service in 2011 and has accumulated over a decade of operations. The most serious incidents were the 2013 battery fires on two separate 787s, which grounded the fleet for months but caused no fatalities (One Mile at a Time notes the 787’s overall safety record).

What is the safety record of the 787?

The 787 has a very strong safety record, with no hull losses or passenger deaths. However, minor glitches like the window dimmer failure on BA6 are not rare. One Mile at a Time (aviation blog) reported that this was not the first window dimming issue on the 787, though such events rarely make headlines.

Have there been any fatal accidents?

No fatal accidents have been recorded. The 787’s incident list includes mostly non-critical mechanical issues (Paddle Your Own Kanoo). The BA6 window glitch itself did not endanger the aircraft, as the dimming system is a passenger comfort feature, not a safety-critical component.

The pattern: non-critical system failures, while not safety hazards, can still ruin the passenger experience and highlight design vulnerabilities.

For British Airways, the incident is a reminder that even a minor system failure can severely degrade passenger comfort on a 14-hour flight. The airline has not issued an official statement, but affected passengers are likely to pursue compensation. For Boeing, the BA6 glitch adds to a pattern of electrochromic window issues that, while never dangerous, test the patience of travellers who pay a premium for a modern flying experience. The choice for the manufacturer is clear: either redesign the dimming system with a manual backup, or accept that frustrated passengers will keep asking why a $300 million aircraft can’t block out the sun.

Frequently asked questions