Thomson Airways says one of its Boeing 787 Dreamliner planes travelling from England to the U.S. had to turn back after experiencing a technical issue. 
 
 The incident is the second to involve one of Boeing Co.'s troubled planes on Friday. Earlier, Heathrow Airport temporarily shut down its runways due to a fire on an empty 787. 
 
 Thomson said that flight 126 travelling from Manchester Airport to Sanford, Florida had returned to Manchester "as a precautionary measure." 
 
 It said all passengers had disembarked from the plane and engineers are inspecting the aircraft. 
 
 THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below. 
 
 A fire on an empty Boeing 787 Dreamliner plane forced Heathrow Airport to temporarily close both its runways Friday. 
 
 The incident comes as unwelcome news for Chicago-based Boeing Co., whose Dreamliners were cleared to fly again in April after a four-month grounding amid concerns about overheating lithium-ion batteries. 
 
 Heathrow said there were no passengers aboard the Ethiopian Airlines plane, which was parked at a remote stand of the airport, and runways reopened after about an hour. British police said the fire is being treated as unexplained. 
 
 Boeing spokesman Marc Birtel said in an email that the company had personnel on the ground at Heathrow and "is working to fully understand and address" the situation. 
 
 Ethiopian Airlines was the first airline to resume using the 787, with a flight on April 27 from Ethiopia's capital of Addis Ababa to Nairobi, Kenya, after the battery incidents. 
 
 The airline could not immediately be reached for comment. 
 
 Television images showed nearly a dozen fire trucks on the scene at Heathrow and firefighters standing around the Ethiopian Airlines plane, which was parked on a remote stand. 
 
 Fire-retardant foam appeared to have been sprayed, and it was not immediately clear if there was damage to the plane. 
 
 The Dreamliner suffered battery incidents in January, including an emergency landing of one plane and a fire on another. U.S. federal authorities lifted the grounding order on April 19, and several airlines have recently resumed flying their Dreamliners. 
 
 None of the incidents caused any serious injuries. But the January grounding embarrassed Boeing and disrupted schedules at the eight airlines that were flying the planes. The company had delivered 50 of the planes worldwide. 
 
 Boeing never did figure out the root cause of the battery incidents. Instead, it redesigned the battery and its charger. The changes included more heat insulation between each cell and charging the battery to a lower maximum voltage. 
 
 Shares in Boeing fell 6.5 percent to $99.58 on news of the Heathrow fire. 
 
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 Associated Press writers Raphael Satter in London and Scott Mayerowitz in New York contributed to this report. ||||| Image caption An area in front of the tail area on the fuselage appeared to be scorched 
 
 Flights have resumed at London's Heathrow Airport after a fire on a parked Ethiopian Airlines Boeing 787 Dreamliner jet. 
 
 All runways were closed for nearly 90 minutes after the fire at 16:30 BST. No passengers were aboard the plane at the time, a Heathrow spokesman said. 
 
 Fifty Dreamliners worldwide were grounded in January after malfunctions with the plane's lithium-ion batteries. 
 
 Boeing modified the jets with new batteries and flights resumed in April. 
 
 The Air Accidents Investigation Branch of the Department for Transport has despatched a team to the scene. 
 
 The Ethiopian Airlines Dreamliner in the Heathrow incident - named the Queen of Sheba - flew from Addis Ababa to Nairobi on the first commercial flight since the grounding. 
 
 Pictures of the Heathrow fire showed the Queen of Sheba close to a building and surrounded by fire vehicles. London Fire Brigade said its crews assisted Heathrow staff. 
 
 Fire-retardant foam was sprayed at the airliner, and an area on top of the fuselage in front of the tail appeared to be scorched. 
 
 Ethiopian Airlines said smoke was detected from the aircraft after it had been parked at Heathrow for more than eight hours. 
 
 Production difficulties 
 
 Media playback is unsupported on your device Media caption Aerial pictures show the plane surrounded by emergency crews 
 
 A Heathrow spokesman said: "Heathrow's runways are now fully open following an earlier fire on board an Ethiopian Airlines aircraft which the airport's emergency services attended. 
 
 "The aircraft was parked on a remote parking stand and there were no passengers on board. Arrivals and departures were temporarily suspended while airport fire crews attended to this incident. 
 
 "This is a standard procedure if fire crews are occupied with an incident." 
 
 Heathrow reopened shortly before 18:00 BST but was advising passengers to check the status of their flights with the airlines. 
 
 Gatwick Airport said it experienced minor delays on departing flights as it assisted Heathrow with flights that were diverted. 
 
 Meanwhile, Thomson Airways said one of its Dreamliners travelling to Florida returned to Manchester Airport as a precautionary measure, not connected to the Heathrow fire. 
 
 Thomson, which became the first British carrier to operate the aircraft earlier this week, and is taking delivery of eight of the planes, said the plane had "experienced a technical issue". 
 
 British Airways is taking delivery of the first two of its 24 Dreamliners. 
 
 Virgin Atlantic said it "remains committed" to taking on the first of its 16 Dreamliners in September 2014. 
 
 The British pilots' union Balpa said: "The Boeing 787 Dreamliner forms an important part of many of our airlines' future plans, and it is vital that the cause of this fire is established as quickly as possible. 
 
 "All parties in the industry need a full and transparent explanation as to what has been identified as the root causes in this series of events." 
 
 The battery problems followed production difficulties for the Dreamliner, marketed as a quiet, fuel-efficient aircraft carrying between 201 and 290 passengers on medium-range routes. 
 
 It was due to enter passenger service in 2008 but it was not until October 2011 that the first commercial flight was operated by Japan's All Nippon Airways. 
 
 The groundings of all Dreamliners in service in January followed two major incidents concerning the plane's two lithium-ion batteries. 
 
 On 7 January, a battery overheated and started a fire on a Japan Airlines 787 at Boston's Logan International Airport. Nine days later, an All Nippon Airways 787 had to make an emergency landing in Japan after a battery started to give off smoke. 
 
 The two batteries are not used when the 787 is in flight. 
 
 They are operational when the plane is on the ground and its engines are not turned on, and are used to power the aircraft's brakes and lights. 
 
 The new versions of the batteries, which run at a much cooler temperature, are now enclosed in stainless steel boxes. 
 
 Boeing shares fell on the New York Stock Exchange on news of the fire. 
 
 A Boeing spokesman said: "We're aware of the event. We have Boeing personnel on the ground at Heathrow and are working to fully understand and address this." ||||| Media playback is unsupported on your device Media caption The ANA flight made an emergency landing at Takamatsu 
 
 Japan's two main airlines have grounded their Boeing 787 Dreamliners after one was forced to make an emergency landing because of battery problems. 
 
 All Nippon Airways (ANA) grounded its fleet of 17 Dreamliners when its flight NH 692 from Yamaguchi Ube was forced to land shortly after take-off. 
 
 Japan Airlines followed suit, saying it would ground its fleet of seven 787s from 16 January until further notice. 
 
 This is the latest setback for Boeing and its problem-hit Dreamliner planes. 
 
 On Wall Street, shares in Boeing closed down more than 3% following the Japanese announcements on Wednesday. 
 
 In recent weeks, Dreamliners have suffered issues including fuel leaks, a cracked cockpit window, brake problems and an electrical fire. 
 
 Analysis There have been six separate safety incidents with Japanese-owned 787s in the last week and a half. But they are not all equal. The incident today was by far the most serious. Smoke inside an aircraft while in-flight is always a serious matter. That's why the plane was so quickly diverted, and probably why ANA and JAL have now ordered their fleets to be grounded. It also looks like this incident may not be isolated. It appears very similar to an electrical fire on board a Japan Airlines 787 in the United States last week. The source of that fire was the 787's lithium Ion battery pack. All the way back in 2007, the US Federal Aviation Administration expressed concern about the installation of Lithium Ion batteries on board the 787 because of their known problem with so-called "thermal runaway". It's a problem that has caused mobile phones and laptop computers to catch fire in the past. The 787 is not the only aircraft to use Lithium Ion battery packs. The Airbus A380 uses a smaller number. And the upcoming Airbus A350 will use a much larger number 
 
 "You're nearing the tipping point where they need to regard this as a serious crisis," said Richard Aboulafia, a senior analyst with the Teal Group in Fairfax, Virginia. 
 
 "This is going to change people's perception of the aircraft if they don't act quickly." 
 
 Battery malfunction 
 
 On Wednesday, ANA's flight NH 692 left Yamaguchi Ube in western Japan at 08:10 local time (23:10 GMT) and headed for Tokyo's Haneda airport. 
 
 Earlier reports that smoke was seen in the cockpit were inaccurate, ANA said. The pilots saw a warning on their computer screen telling them there was smoke inside one of the electrical compartments, the airline said. The source of the smoke is not yet known. 
 
 The pilots also received a warning that there was a fault in the battery system. ANA said the battery in the forward cargo hold was the same type as the one involved in a fire on another Dreamliner at a US airport last week. 
 
 The ANA flight landed at Takamatsu airport at 08:47 on Wednesday after the pilot saw an error message in the cockpit. 
 
 "There was a battery alert in the cockpit and there was an odd smell detected in the cockpit and cabin, and [the pilot] decided to make an emergency landing," said Osamu Shinobe, an ANA vice president, at a news conference. 
 
 ANA said that the 129 passengers and eight crew were evacuated, with a number of people sustaining minor injuries. 
 
 The Reuters news agency reported that five people were injured, while Bloomberg said that one person was sent to hospital. ANA officials were not immediately available to confirm the figures. 
 
 The BBC's correspondent in Tokyo, Rupert Wingfield-Hayes, said that local television footage showed emergency chutes were deployed from the plane. There were also fire trucks on the runway. 
 
 Paul Lewis, a spokesman for Boeing, told the BBC that the planemaker was "aware of the diversion of a 787 operated by ANA to Takamatsu in western Japan". 
 
 He added that Boeing "will be working with our customer and the appropriate regulatory agencies". 
 
 Dreamliner's technical problems 
 
 CLICKABLE Labels 
 
 Off 
 
 On Fuel tanks Electronics Engines Brakes Cockpit Fuel tanks 8 Jan 2013: Take-off aborted after about 150 litres of fuel spill from Japan Airlines Dreamliner in Boston 13 Jan: Same aircraft experiences another, separate fuel leak while undergoing tests in Tokyo Electronics 4 Dec 2012: A United Airlines 787 makes emergency landing in New Orleans after electrical problems 13 Dec: Qatar Airways 787 grounded after electrical power distribution problems 17 Dec: United finds electrical problem in second aircraft 7 Jan 2013: Fire starts in lithium ion battery pack of Japan Airlines 787 in Boston 8 Jan: United Airlines also finds faulty wiring to battery Engines July 2012: Fan shaft on engine fails during runway tests at Charleston International Airport 11 Jan 2013: Oil leak found in engine of All Nippon Airways 787 flight Brakes 9 Jan 2013: All Nippon Airways cancels flight when computer wrongly reports a brake problem Cockpit 11 Jan 2013: Cockpit window on an All Nippon Airways Dreamliner cracks during a Japanese domestic flight. The plane lands safely with no injuries 15 Jan: Another Dreamliner operated by ANA makes an emergency landing at Takamatsu in Japan after a smoke alert goes off 
 
 Market Reaction 
 
 The concerns have spread beyond Japan, however, not least because the Dreamliner was seen as Boeing's flagship new aeroplane and had attracted orders from many of the world's biggest and best-known airlines. 
 
 The 787 is said to be one of the most fuel-efficient in the industry, and Boeing delivered 46 Dreamliners to customers in 2012. 
 
 Following Wednesday's landing, India's aviation regulator said it would review the Dreamliner's safety and talk to parts makers. 
 
 The regulator said it was in contact with Boeing but as yet had no plans to ground the six Dreamliners that are currently being used by Air India. 
 
 Dreamliners in use Air India: 6 
 
 All Nippon Airways (Japan): 17 
 
 Ethiopian Airlines: 4 
 
 Japan Airlines: 7 
 
 LAN Airlines (Chile): 3 
 
 Lot Polish Airlines: 2 
 
 Qatar Airways: 5 
 
 United Airlines (US) 6 
 
 Total: 50 Source: Boeing 
 
 Australia's Qantas Airways said its order for 15 Dreamliners remained on track. Its subsidiary Jetstar is due to take delivery of the first of its aircraft in the second half of this year. 
 
 United Airlines is the only US carrier currently flying Dreamliners, and the carrier said it was not taking any immediate action. 
 
 Closer look 
 
 Even before Wednesday's emergency landing, Boeing was facing an inquiry by Japanese and US authorities over its Dreamliner issues. 
 
 Last week, the US Federal Aviation Administration started a joint review with Boeing of the design, manufacturing and assembly of the Dreamliner. 
 
 On Tuesday, Japanese authorities said they would conduct an inquiry after two successive fuel leaks on a different 787 operated by Japan Airlines. 
 
 On 8 January, Japan Airlines reported that a fire broke out on a 787 shortly after it landed in Boston. There have also been reports of brake issues. 
 
 Media playback is unsupported on your device Media caption Inside the cockpit of the Dreamliner 
 
 "It is not abnormal for new aircraft to have some teething problems," said Chris de Lavigne of Frost and Sullivan in Singapore. 
 
 "There were initial issues with the Airbus A380 as well. Look where it is today; it is flying successfully and everyone seems to be happy with it." 
 
 However, he added that a lot would depend on the outcome of the two investigations. 
 
 "If it turns out to be a major issue and requires re-engineering to be done, then you may need to ground some of the planes or even the entire fleet."
– Looks like the Boeing 787's fire issues aren't entirely behind it. A parked Dreamliner, owned by Ethiopian Airlines, caught fire today at Heathrow airport, prompting a suspension of all arrivals and departures to the London airport, the BBC reports. No passengers were aboard, no injuries have been reported, and the airport has since reopened. But the incident is likely to raise more doubts about the benighted Dreamliner—and sure enough, Boeing's stock plunged on the news, the AP reports. And as if that wasn't enough bad news for the plane maker, later another 787 flying from Manchester to the US had to turn around after encountering an unspecified mechanical failure. All 126 passengers aboard have now disembarked safely. The plane's operator, Thompson Airways, describes the emergency landing as a "precautionary measure."