Aloha Airlines Flight Two Forty-Three, the Convertible Seven Thirty-Seven, and the Metal Fatigue That Peeled the Roof Off at Twenty-Four Thousand Feet

On April 28, 1988, Aloha Airlines Flight 243 lost roughly 18 feet of its upper fuselage in about one second while cruising at 24,000 feet over Hawaii. The cause was not a bomb, a storm, or pilot error - it was metal fatigue compounded by corrosion, a slow structural failure hiding in an airframe that had passed its inspections. The accident killed one flight attendant, injured 65 people, and became one of the most important structural safety turning points in aviation history.

What Happened to Aloha Airlines Flight 243?

Flight 243 was a Boeing 737-200 flying Aloha’s interisland shuttle from Hilo to Honolulu with 90 passengers and 6 crew aboard. It climbed out normally and leveled at 24,000 feet.

Then, without warning, a large section of the upper fuselage just behind the cockpit tore away. The explosive decompression peeled the cabin roof back from around the first row to the wing area - turning the jet into an open-air “convertible.”

Passengers in the forward rows were suddenly exposed to open sky, still strapped in their seats, in a wind exceeding 200 mph at temperatures well below freezing. The cockpit door was gone, and the first officer could see daylight where the first-class ceiling had been.

Who Died and Who Survived?

One person did not survive. Flight attendant Clarabelle “C.B.” Lansing was standing in the cabin when the structure failed and was swept out of the aircraft. She was never recovered.

The other 95 people aboard lived. Sixty-five were injured, some seriously, but everyone else walked away - an outcome that defied every reasonable expectation given the damage.

How Did the Crew Land a Plane With No Roof?

Captain Robert Schornstheimer and First Officer Madeline “Mimi” Tompkins were flying an aircraft that had fundamentally changed shape in flight. Drag was enormous, and the airplane was on the edge of controllability.

The noise made normal communication impossible - they relied partly on hand signals with a hurricane blowing through the cabin. They donned oxygen masks, put the nose down, and began an emergency descent toward Kahului Airport on Maui, the nearest field.

On the way down, the problems multiplied: the number one engine quit, leaving them on a single engine, and the landing gear indicators would not confirm the nose gear was down and locked.

They landed it anyway. Thirteen minutes after the roof came off, the 737 touched down on Maui and stopped on the runway. Passengers evacuated down the slides.

Why Did the Roof Come Off? Understanding Metal Fatigue

The NTSB determined the cause was metal fatigue, and this is the part that matters most.

Metal does not simply fail because it is old - it fails because it has been worked. Every time an airliner is pressurized, the fuselage inflates slightly like a balloon; when it lands and the doors open, it relaxes. Each inflate-relax event is a cycle, and each cycle puts a tiny amount of strain into the aluminum, especially where skin panels are joined.

This particular 737 flew short interisland hops, so it accumulated cycles far faster than hours. It had logged roughly 89,000 flight cycles - the second-highest-cycle airplane of its type in the world at the time. Relatively few flight hours, but pressurized and depressurized more times than almost any airplane alive.

It also spent its entire life in warm, wet, salt-air conditions. Salt and moisture drive corrosion, and corrosion plus fatigue is a partnership that destroys airframes.

What Is Multiple Site Damage?

On this 737 model, the skin panels along the top of the fuselage were joined with a lap joint using a cold-bond adhesive plus rivets. Over years of service, that bond could break down, moisture could intrude, and load meant to be shared across a wide bonded area instead concentrated on the rivet line.

At the rivet holes, tiny fatigue cracks began forming - not one large crack, but many small ones marching along the row of rivet holes like a perforated line on paper.

The investigation named the danger: multiple site damage. Individually, each crack was too small to trigger an alarm, but they could suddenly link up. When they join, you don’t get a slow leak that warns the crew - you get the whole panel unzipping at once.

There was even a visible warning that morning. A passenger boarding in Hilo later said she noticed a crack in the fuselage skin as she walked to the door but did not report it. The evidence was visible to the naked eye on the ramp, and the airplane flew anyway.

How Did Aloha 243 Change Aviation Safety?

Before this accident, the industry largely believed that well-maintained older aircraft were fine indefinitely, protected by fail-safe design. Flight 243 broke that belief in half: the airplane was maintained, it had passed inspections, and it still came apart.

The response reshaped how the world watches its airline fleet:

• The FAA launched a formal Aging Airplane program.
• Regulators mandated specific, repetitive inspections tied to flight cycles, not calendar age.
• Corrosion prevention and control programs became standard.
• Research was funded into exactly how fatigue cracks grow and link up, so inspectors knew where to look.
• Congress eventually passed aging aircraft safety rules that govern the fleet today.

Today, every airliner’s airframe is tracked cycle by cycle, with hard inspection thresholds built around fatigue and corrosion - a system that exists in large part because of what happened over Maui in 1988.

Why This Matters for Pilots of Any Aircraft

The lesson of Aloha 243 is not really about pressurization - it’s about the difference between an airplane that looks fine and one that is fine. It applies to anything with wings.

Corrosion doesn’t care about the logbook. A trainer or classic taildragger tied down near the coast fights the same salt air that ate the Aloha jet, just slower. If your airplane lives outside near the ocean, near agricultural chemicals, or anywhere wet, corrosion is working on the inside of the structure right now. Have a mechanic open the inspection panels and put a light, mirror, or borescope into the belly, the wing spar areas, and around the battery box - the dangerous corrosion is almost never visible from outside.

Fatigue lives at the joints and the holes. On your airplane that means rivet lines, spar attach points, engine mount bolt holes, and landing gear attach structure. This is why some aircraft carry life-limited parts and why certain models have Airworthiness Directives (ADs) requiring repeat inspections of specific structure. A recurring AD on a wing spar or fuselage is not paperwork - it marks where the metal gets tired.

Trust what you see on preflight. A wrinkle in the skin, a line of popped or smoking rivets, a crack, paint cracking in a suspiciously straight line, or filiform corrosion bubbling under the finish - do not talk yourself out of it. The passenger in Hilo saw a crack and stayed quiet; you are the pilot, and you don’t have to. Ground it and get eyes on it. The most expensive words in aviation are “it’s probably nothing, let’s go.”

The airframe has a lifespan. It quietly keeps score every time you fly, and the failure can come from the structure you never think about because it has always just been there, holding you up.

Key Takeaways

• Aloha Airlines Flight 243 lost 18 feet of upper fuselage at 24,000 feet on April 28, 1988, yet 95 of 96 aboard survived; flight attendant Clarabelle Lansing was the sole fatality.
• The cause was metal fatigue and corrosion, driven by the aircraft’s roughly 89,000 pressurization cycles and Hawaii’s salt-air environment - not pilot error or an external event.
• Cracks at the fuselage lap-joint rivet holes created multiple site damage that linked up and failed the panel all at once.
• The accident launched the FAA Aging Airplane program and cycle-based inspection rules that protect the airline fleet today.
• For all pilots: inspect for corrosion inside the structure, respect recurring ADs and life-limited parts, and never rationalize away a visible defect on preflight.