The Gimli Glider, Air Canada One Four Three, and the Night a Boeing Seven Sixty-Seven Ran Out of Fuel at Forty-One Thousand Feet and Landed Dead-Stick on a Drag Strip

On July 23, 1983, Air Canada Flight 143, a nearly new Boeing 767, ran out of fuel at 41,000 feet over Canada and became the largest glider in the sky. With both engines dead and most of the cockpit gone dark, Captain Bob Pearson and First Officer Maurice Quintal flew the powerless jet to a dead-stick landing on a former air force runway at Gimli, Manitoba - a strip that had been converted into a drag racing track. All 69 people aboard survived. The aircraft has been known as the Gimli Glider ever since.

What Caused the Gimli Glider to Run Out of Fuel?

The root cause was a fuel conversion error made worse by a broken gauge system and a country in the middle of switching to the metric system.

In 1983, Air Canada had just taken delivery of its first Boeing 767s. The airframe in this story had only about four months in service. It was also the first aircraft in the entire fleet to measure fuel in kilograms instead of pounds - every other airplane Air Canada flew still used pounds.

That day, the aircraft’s fuel quantity gauges were not working because of a blown channel in the processor. So the crew used an approved workaround: a drip check, physically dipping the tanks with a calibrated stick, the way you’d check the oil in a truck. The dip gave them a reading in liters.

Someone then had to convert liters of fuel into a weight. To do that, you multiply volume by the fuel’s density. The number they used was 1.77 - which is the number of pounds in a liter of jet fuel.

But this airplane ran on kilograms, and a liter of jet fuel weighs about 0.8 kilograms, not 1.77. Everyone checked the paperwork, saw a healthy fuel figure, and signed off. In reality, the aircraft was carrying less than half the fuel the crew believed it had.

How Did Both Engines Fail in Flight?

The flight departed Montreal bound for Edmonton, with a scheduled stop in Ottawa, and climbed to cruise at 41,000 feet. Everything was routine until, somewhere over Red Lake, Ontario, a warning chime sounded for low fuel pressure on the left side.

With the gauges unreliable, Pearson trusted the paperwork - which said fuel was plentiful - and assumed a failing fuel pump. Then came a second chime: low pressure on the right side too.

Two pumps failing on opposite sides at the same instant point to only one thing they share in common - there was no fuel. The crew turned toward Winnipeg and began a descent. Moments later the left engine spooled down and quit, and a couple of minutes after that, the right engine stopped as well.

What Happens When a Jet Loses All Engine Power?

Losing both engines on a modern jetliner costs you more than thrust. The engines also generate the aircraft’s electrical power and hydraulic pressure, so most of the glass cockpit went dark.

Pearson was left with a handful of battery-powered standby instruments: an airspeed indicator, an artificial horizon, an altimeter, and a magnetic compass - roughly the panel of a 1940s trainer.

Boeing had planned for this. A ram air turbine (RAT) dropped into the slipstream, spun by the wind, and produced just enough hydraulic pressure to move the primary flight controls. It was barely enough to fly the airplane - but it was enough.

Why Did a Glider Pilot Make the Difference?

Captain Bob Pearson was an experienced glider pilot who flew engineless sailplanes on weekends for fun. Nothing in airline training - then or now - teaches a pilot how to dead-stick a hundred-ton jetliner from cruise altitude to a runway. It simply wasn’t in the book, because no one imagined it would be needed.

But a glider pilot understands best glide speed - the exact airspeed that yields the most distance per foot of altitude. That figure had never been published for a 767, so Pearson estimated it. He settled on about 220 knots and held it precisely.

Meanwhile, First Officer Maurice Quintal worked the numbers on how far they could reach. Winnipeg was too far. Quintal, a former Royal Canadian Air Force pilot, remembered an old military field at Gimli, on the shore of Lake Winnipeg, where he had once been stationed. It was close enough to try. They turned for Gimli.

What Was Waiting for Them at Gimli?

What the crew did not know was that Gimli was no longer an active air force base. It had closed, and one of its two runways had been turned into a drag strip.

That Saturday, the site was crowded. A sports car club was racing, families were camped alongside the pavement, and children were riding bicycles near the runway. The crew knew none of this. They saw a strip of concrete, no engines, and one chance to use it.

How Do You Slow a Jetliner With No Engines?

Turning final, Pearson realized he was too high and too fast. A clean airplane - gear up, flaps up - is slick and does not want to stop flying, so he was on track to overshoot the entire field.

The classic fix is a forward slip: cross the controls, kicking rudder one way and lowering a wing the other, so the fuselage flies slightly sideways and acts as a giant air brake. It lets you descend steeply without gaining speed. It’s an old stick-and-rudder technique taught in light taildraggers.

Pearson slipped a 200,000-pound Boeing airliner on final approach, dead-stick, with a dark cockpit - a maneuver many career jet pilots never perform, because they’re never supposed to need it. His hands knew the move from a thousand repetitions in a glider.

How Did the Gimli Glider Landing End?

When Quintal selected the gear, the main wheels free-fell and locked on gravity, but the nose gear came partway down and did not lock.

The 767 touched down hard on the mains. Pearson braked so aggressively that two tires blew out. As the nose dropped, the unlocked nose gear folded back under the aircraft, and the nose scraped along the concrete in a shower of sparks. That friction actually helped slow the jet.

The collapsing nose gear dropped the front of the airplane and helped it stop short of the crowd. Two children on bicycles reportedly pedaled clear just in time. A small fire started around the nose, and race-track workers - who had extinguishers on hand for the cars - put it out.

All 61 passengers and 8 crew survived. There were no serious injuries; a few minor scrapes came from the rear evacuation slides, which were steep because the nose-down attitude left the tail high in the air.

Why the Gimli Glider Story Still Matters

Yes, it began with a mistake - a pounds conversion factor used on the one airplane that measured in kilograms, in a country halfway through switching its units. The investigation by the Transportation Safety Board of Canada spread responsibility across the airline, the procedures, and the circumstances. That’s how the industry learns.

But the lasting lesson is that everything that saved those 69 people was old knowledge: the slip, best-glide airspeed, reading the aircraft’s energy, and correcting a high approach with nothing but rudder, aileron, and nerve. Pearson didn’t save the jet with technology Boeing built into it. He saved it with skills learned in a sailplane, purely for the love of flying.

That’s the enduring point for student pilots: when your instructor has you doing power-off forward slips to a spot again and again, learn it cold. You will almost certainly never need it the way Bob Pearson did - but aviation is as safe as it is precisely because someone knew the old way when the new way quit.

Key Takeaways

• Air Canada Flight 143 ran out of fuel at 41,000 feet on July 23, 1983, because a fuel load was calculated using a pounds-per-liter factor (1.77) on a 767 that measured fuel in kilograms (correct density ~0.8 kg/liter).
• The aircraft was carrying less than half its intended fuel; both engines quit, and a ram air turbine provided just enough hydraulic power to fly.
• Captain Bob Pearson, a glider pilot, held roughly 220 knots best-glide and used a forward slip to lose altitude on final.
• First Officer Maurice Quintal identified the closed military field at Gimli, Manitoba, then unknowingly a drag strip crowded with people.
• All 69 aboard (61 passengers, 8 crew) survived, and the jet earned the nickname Gimli Glider.