The Gimli Glider, Air Canada One Forty-Three, and the Brand-New Boeing Seven Sixty-Seven That Ran Out of Fuel at Forty-One Thousand Feet and Was Landed on a Drag Strip by a Glider Pilot

On July 23, 1983, Air Canada Flight 143, a brand-new Boeing 767 carrying about 69 people, ran completely out of fuel at 41,000 feet over Manitoba. Both engines flamed out, most of the cockpit went dark, and the crew glided the powerless wide-body to a dead-stick landing on a decommissioned airbase runway that had been converted into a drag strip. Everyone survived, and the aircraft earned a nickname it would carry for the rest of its career: the Gimli Glider.

What Was the Gimli Glider?

The “Gimli Glider” is the nickname given to the specific Boeing 767 that flew as Air Canada Flight 143. The aircraft was routed from Montreal to Ottawa and onward to Edmonton when a fueling error left it with less than half the fuel it needed. When both engines quit in cruise, the jet became - for a few harrowing minutes - the largest glider anyone had ever flown.

The 767 was cutting-edge for the early 1980s. It had two high-bypass engines, a glass cockpit that was a genuine novelty at the time, and computers that handled fuel calculations once done by hand. It was so automated that it carried no flight engineer - just two pilots up front.

Why Did Air Canada Flight 143 Run Out of Fuel?

The root cause was a unit conversion error tied to Canada’s ongoing switch to the metric system. Unlike every airliner before it, this 767 measured its fuel in kilograms instead of pounds - and that difference is the entire story.

The aircraft’s fuel gauges were inoperative before departure. Regulations allowed the flight to proceed as long as the crew confirmed the fuel load manually using a dripstick - a device under the wing that measures the physical volume of fuel in the tanks. You read the stick, get a volume in liters, then convert that volume to a weight, because pilots plan in weight, not volume.

That conversion is where it all went wrong. To turn liters into weight, you multiply by the fuel’s density:

• Pounds per liter: about 1.77
• Kilograms per liter: about 0.8

The crew and ground staff, working through unfamiliar metric math on a new aircraft, used 1.77 - the pounds figure - when the airplane needed kilograms. The arithmetic was double what it should have been. Every number checked out on paper, the dripstick reading was accurate, and everyone agreed there was plenty of fuel for Edmonton. In reality, the tanks held less than half of what was required.

The same wrong number was used again during a re-check on the ground at Ottawa, confirming the same false answer. The jet launched westward with nobody aboard knowing the tanks were nearly dry.

What Happened When the Engines Failed?

Somewhere over Red Lake, Ontario, at 41,000 feet, a warning chime sounded - a tone Captain Pearson later said he’d never heard in the simulator - signaling a fuel pressure problem on the left side. A second chime followed for the right side. Then the left engine ran down and quit. Minutes later, the right engine flamed out as well.

With both engines gone, the crew lost far more than thrust. The engines generate the aircraft’s electrical power and most of its hydraulic pressure, so the glass cockpit screens went dark. Captain Pearson was left with a handful of basic standby instruments: airspeed, altitude, and a magnetic compass.

Boeing’s backup saved the situation. A ram air turbine (RAT) - a small propeller-driven turbine - automatically dropped into the slipstream, and the rushing air spun it to produce just enough hydraulic pressure to move the flight controls. Pearson suddenly had an airplane he could steer.

Who Landed the Gimli Glider?

The two pilots were Captain Robert “Bob” Pearson and First Officer Maurice Quintal, and both of their backgrounds proved decisive.

Pearson was an experienced glider pilot who flew sailplanes on his days off. He knew instinctively how to fly an aircraft with no engine and no prospect of getting one back. The moment the engines quit, he did what a sailplane pilot does when the tow rope releases: he set up for best glide speed, the airspeed that carries the aircraft the maximum distance for every foot of altitude lost. On a light trainer it’s a placard number; on a 767 nobody had ever glided, it was Pearson’s judgment, flown by feel.

Quintal was a former Royal Canadian Air Force pilot who knew the region from his service years. He worked the descent math and quickly determined they could not reach Winnipeg. Then he remembered Gimli, Manitoba, where he had once been stationed at RCAF Station Gimli. He knew there was a runway there - but not what it had become.

The Landing at Gimli

The former airbase had been closed, and its runway was now a motorsport park - a drag strip and road-racing course. On that Saturday it was packed with race cars, go-karts, and families camping right alongside the pavement. A race was in progress on the very concrete Pearson was aiming for.

The workload was immense: no engines, minimal instruments, and a slick airplane that didn’t want to slow down or descend where needed. The crew lowered the landing gear by gravity extension, releasing the locks so the wheels fell under their own weight. The main gear locked down, but the nose gear fell only partway and would not lock.

Coming over the field, the jet was too high and too fast, with no engine power to go around. So Pearson reached into the glider pilot’s toolkit one more time and did something never done in a commercial wide-body: he forward-slipped the airplane. By cross-controlling - full rudder one way, wing lowered the other - he turned the fuselage into a giant air brake, dumping altitude without gaining speed, and set the jet down on the numbers.

The main wheels touched, the unlocked nose gear collapsed as feared, and the nose dragged on the concrete in a shower of sparks. That collapse turned into a blessing: the dragging nose helped scrub off speed, and the aircraft ground to a stop before reaching the crowd at the far end. A small fire up front was quickly extinguished by race crews who happened to be standing by with fire equipment.

Every person on board survived. The only injuries were minor, sustained on evacuation slides that were unusually steep because the nose was on the ground and the tail was in the air.

Why the Gimli Glider Still Matters for Pilots

Investigators - through the Canadian aviation safety investigation and the accounts left by the crew - did not blame a single careless individual. The accident was a chain of small failures: a new aircraft, a new measurement system, broken fuel gauges, a confusing conversion, and several competent people independently arriving at the same wrong number. That’s how most accidents happen - not one blunder, but a string of small ones all pointing the same direction.

The other half of the lesson is the hopeful one. When automation went dark, what saved everyone was fundamental stick-and-rudder flying: best glide speed, a forward slip, gravity gear extension, and a captain whose weekend sailplane habit made gliding a jet feel routine. It’s a reminder of why instructors still pull the power to idle and have students pick a field - because someday the sophisticated systems go quiet, and all that’s left is what’s in your hands and your head.

Key Takeaways

• Air Canada Flight 143 ran out of fuel at 41,000 feet on July 23, 1983, due to a liters-to-weight conversion error - the crew used the pounds density (1.77) instead of the kilograms density (0.8) on Canada’s first metric airliner.
• The Boeing 767 was loaded with less than half the fuel required, and the same wrong figure was confirmed twice before departure.
• With both engines out, the ram air turbine (RAT) restored just enough hydraulic pressure for Captain Robert Pearson to control the aircraft.
• Pearson, a glider pilot, used best glide speed and an unheard-of forward slip in a wide-body to land on a former airbase runway turned drag strip at Gimli, Manitoba, guided there by First Officer Maurice Quintal’s memory of the field.
• All 69 people aboard survived, and the accident stands as a classic case of an error chain defeated by basic airmanship.