{"id":221942,"date":"2026-04-05T08:32:06","date_gmt":"2026-04-05T06:32:06","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/?p=221942"},"modified":"2026-06-25T21:40:12","modified_gmt":"2026-06-25T19:40:12","slug":"united-232-the-dc-10-that-landed-with-no-hydraulics","status":"publish","type":"post","link":"https:\/\/migflug.com\/jetflights\/es\/united-232-the-dc-10-that-landed-with-no-hydraulics\/","title":{"rendered":"United 232: The DC-10 That Landed With No Hydraulics"},"content":{"rendered":"\n<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\n\n\n\n<table style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:15px;line-height:1.6\">\n<thead><tr><th colspan=\"2\" style=\"background:#1a1a2e;color:#fff;padding:12px 16px;text-align:left;font-size:16px\">Quick Facts<\/th><\/tr><\/thead>\n<tbody>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee;width:35%\">Flight<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">United Airlines Flight 232, Denver to Chicago<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">Date<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">July 19, 1989<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">Aircraft<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">McDonnell Douglas DC-10-10 (N1819U)<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">Crew<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">Captain Al Haynes, First Officer Bill Records, Flight Engineer Dudley Dvorak, plus off-duty instructor Captain Dennis Fitch<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">Failure<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">Uncontained failure of #2 (tail) engine fan disk severed all three hydraulic systems<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">Control Method<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">Differential thrust only \u2014 varying power on engines #1 and #3 to steer<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">On Board<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">296 people (285 passengers + 11 crew)<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">Outcome<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">185 survived (62.5%), 111 died \u2014 engineers had predicted zero survivors<\/td><\/tr>\n<tr><td style=\"padding:10px 16px;font-weight:600;border-bottom:1px solid #eee\">Landing Site<\/td><td style=\"padding:10px 16px;border-bottom:1px solid #eee\">Sioux Gateway Airport, Sioux City, Iowa \u2014 Runway 22 (closed runway)<\/td><\/tr>\n<\/tbody><\/table>\n\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\"><img data-opt-id=149933856  fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/d\/d9\/Continental_Airlines_DC-10.jpg\/960px-Continental_Airlines_DC-10.jpg\" alt=\"McDonnell Douglas DC-10 in flight\" style=\"display:block;width:100%!important;max-width:100%!important;height:auto!important;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">A McDonnell Douglas DC-10 \u2014 the wide-body trijet at the centre of one of aviation's greatest survival stories. On July 19, 1989, a DC-10 lost all hydraulic flight controls and its crew flew it with engine power alone. (Wikimedia Commons)<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">At 37,000 feet over Iowa, the tail engine of a DC-10 tore itself apart. Shrapnel from the disintegrating fan disk sliced through the fuselage and severed all three independent hydraulic systems \u2014 something the designers had considered so improbable it wasn't even in the failure analysis. In an instant, Captain Al Haynes and his crew lost every flight control on the aircraft. No ailerons, no rudder, no elevators, no flaps, no slats. A 180-ton jet carrying 296 people was flying, but no one was steering it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What happened next is the most extraordinary display of airmanship in commercial aviation history.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"padding-top:22px\">The Impossible Failure<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The DC-10 has three hydraulic systems \u2014 a deliberate redundancy designed so that losing any one, or even two, still leaves enough control authority to fly and land. But the #2 engine's fan disk didn't just fail. It exploded. Titanium fragments ripped through the horizontal stabiliser and the tail section at supersonic speed, severing hydraulic lines from all three systems in a single catastrophic moment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The probability of losing all three systems simultaneously had been calculated at a billion-to-one. McDonnell Douglas hadn't designed a procedure for it. There was no checklist. There was no simulator scenario. When Flight Engineer Dudley Dvorak reported \"all three hydraulic systems \u2014 we have no quantity, no pressure,\" the crew was facing a situation no airline pilot in history had ever confronted in flight.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The aircraft immediately began a right-rolling, nose-down phugoid \u2014 a series of long, oscillating pitch-and-bank cycles that, left uncorrected, would eventually spiral the jet into the ground. Haynes and First Officer Bill Records fought the control column, but it was dead. Moving the yoke did nothing. The DC-10 was flying on aerodynamics alone.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\"><img data-opt-id=2093947538  fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/4\/4f\/Captain_Al_Haynes_%28cropped%29.jpg\" alt=\"Captain Al Haynes, pilot of United Airlines Flight 232\" style=\"display:block;width:100%!important;max-width:100%!important;height:auto!important;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Captain Al Haynes \u2014 the United Airlines captain who, with the help of three other pilots, landed a hydraulically dead DC-10 using nothing but differential engine thrust. He saved 185 lives that day. (Wikimedia Commons)<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"padding-top:22px\">The Fourth Pilot<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dennis Fitch was an off-duty United Airlines training captain who happened to be sitting in first class. He was also a DC-10 instructor. When the cabin crew told him the situation, he walked to the cockpit and offered to help. Haynes put him on the throttles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What Fitch did next had never been attempted on a commercial aircraft. He used differential thrust \u2014 increasing power on one wing engine while reducing it on the other \u2014 to control the DC-10's bank and heading. More thrust on the left engine turned the aircraft right. More on the right turned it left. By asymmetrically adjusting the two remaining engines, Fitch could make the jet turn. By adding power to both, he could make it climb. By reducing both, it descended.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It was not precise. The phugoid oscillations continued \u2014 the aircraft would climb, slow, drop its nose, accelerate, and climb again in sickening 1,000-foot cycles. But Fitch, working the throttles with both hands, gradually wrestled the DC-10 into something resembling controlled flight. He later described it as trying to balance on a beach ball.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"padding-top:22px\">44 Minutes to Sioux City<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For 44 minutes, the four-man crew flew a crippled trijet toward Sioux Gateway Airport in Sioux City, Iowa \u2014 the nearest airport with emergency services capable of handling a wide-body crash. Haynes worked the radios. Records backed up Fitch on the throttles. Dvorak monitored what was left of the systems. ATC cleared every runway and rolled every fire truck in northwestern Iowa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">They couldn't control airspeed with any precision. They couldn't deploy flaps to slow down for landing. They couldn't lower the landing gear hydraulically \u2014 it dropped by gravity when Dvorak pulled the emergency release. They lined up on Runway 22, a closed runway that happened to be roughly aligned with their approach path. They were coming in at 240 knots \u2014 nearly twice the normal landing speed \u2014 with a sink rate that was far too high and a slight right bank they couldn't correct.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\"><img data-opt-id=1275915006  data-opt-src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/3\/35\/United_Airlines_Flight_232_Initial_Touchdown_Area.jpg\"  decoding=\"async\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20100%%20100%%22%20width%3D%22100%%22%20height%3D%22100%%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22100%%22%20height%3D%22100%%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"Aerial view of United Airlines Flight 232 crash site at Sioux City Airport\" style=\"display:block;width:100%!important;max-width:100%!important;height:auto!important;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The initial touchdown area of United 232 at Sioux Gateway Airport. The DC-10 hit the runway threshold, cartwheeled, broke apart, and burned \u2014 yet 185 of 296 people on board survived. (Wikimedia Commons)<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"padding-top:22px\">The Crash That Saved 185 Lives<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">At 4:00 PM local time, the DC-10 slammed into the runway threshold. The right wing hit first. The aircraft cartwheeled, broke apart, and burst into flames. The cockpit separated from the fuselage. Sections of the cabin were flung across the airfield. The tail section, containing the failed engine, ended up inverted in a cornfield.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One hundred and eleven people died. One hundred and eighty-five survived \u2014 including all four cockpit crew members, who were pulled from the wreckage alive. When engineers later attempted to replicate the scenario in simulators, they crashed every single time. Not one test pilot, given the same failure, managed to get the aircraft to the runway. The universal conclusion: what Haynes, Fitch, Records, and Dvorak accomplished was, by every engineering measure, impossible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Al Haynes never accepted the word \"hero.\" He credited the outcome to cockpit resource management \u2014 the then-new concept that all crew members contribute to decision-making, not just the captain. He also credited luck. But the 185 people who walked away from a burning cornfield in Iowa knew better.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"padding-top:22px\">The Legacy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Flight 232 changed aviation. The NTSB investigation led to mandatory fan disk inspections, redesigned hydraulic system routing to prevent common-cause failures, and accelerated the adoption of CRM training across the airline industry. The concept of propulsion-controlled aircraft \u2014 flying on throttles alone \u2014 became a formal emergency procedure studied in military and civilian programmes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Haynes spent the rest of his life giving lectures on crew resource management and human factors. He died in 2019 at age 87. Fitch died in 2012. Their names may not be as famous as Sully Sullenberger's, but what they did was harder. Sullenberger had flight controls. Haynes had two throttle levers and 44 minutes to figure out how to use them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The next time you hear someone say a situation is impossible, remember Sioux City. Remember four pilots, a dead stick, and 185 reasons why you never give up.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Sources: NTSB Accident Report AAR-90\/06, Aviation Safety Network, Smithsonian Air & Space<\/em><\/p>\n\n\n<!-- mf-faq -->\n\n<div class=\"mf-faq-block\"><style>.mf-faq-block{margin:34px 0}.mf-faq-item:not([open]) .mf-faq-answer{display:none !important}.mf-faq-block h2.mf-faq-h{padding-top:22px;margin-bottom:14px}.mf-faq-item{border:1px solid #e2e8f5;border-radius:8px;margin:0 0 10px;background:#fff}.mf-faq-item summary{list-style:none;cursor:pointer;padding:15px 50px 15px 18px;font-weight:600;color:#1a1a1a;position:relative;line-height:1.45;user-select:none}.mf-faq-item summary::-webkit-details-marker{display:none}.mf-faq-item summary::after{content:\"+\";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:1.5em;font-weight:400;color:#5C91FF;line-height:1}.mf-faq-item[open] summary::after{content:\"\\2013\"}.mf-faq-item[open] summary{border-bottom:1px solid #eef1f8}.mf-faq-item summary:hover{background:#f5f8ff}.mf-faq-answer{padding:14px 18px;color:#333;line-height:1.6}.mf-faq-answer p{margin:0}.mf-faq-answer a{color:#5C91FF}<\/style><h2 class=\"mf-faq-h\">Related Questions<\/h2><details class=\"mf-faq-item\"><summary>What happened to United Airlines Flight 232?<\/summary><div class=\"mf-faq-answer\"><p>United Airlines Flight 232, a DC-10 flying from Denver to Chicago on July 19, 1989, suffered an uncontained failure of its tail engine that severed all three hydraulic systems, leaving the crew with no normal flight controls. Steering with engine thrust alone, they crash-landed at Sioux City; 185 of the 296 people aboard survived.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>How did the crew of Flight 232 fly without hydraulics?<\/summary><div class=\"mf-faq-answer\"><p>With all hydraulics lost, the crew steered United 232 using differential thrust, varying the power on the two remaining wing engines to turn, climb and descend. Captain Al Haynes was helped by off-duty instructor Captain Dennis Fitch. It was an improvised technique never trained for, comparable in difficulty to other <a href=\"https:\/\/migflug.com\/jetflights\/what-happens-fighter-jet-engine-failure-flameout\/\">in-flight emergencies pilots face<\/a>.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>How many people survived United Flight 232?<\/summary><div class=\"mf-faq-answer\"><p>Of the 296 people aboard United Flight 232 (285 passengers and 11 crew), 185 survived and 111 died. Because the aircraft had lost all hydraulic flight controls, engineers had predicted there would be no survivors at all, making the partially successful landing a celebrated feat of airmanship.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>What caused the Flight 232 crash?<\/summary><div class=\"mf-faq-answer\"><p>The disaster began with an uncontained failure of the number-two (tail-mounted) engine's fan disk. Debris from the disintegrating disk cut through all three independent hydraulic systems, which shared a vulnerable routing point in the tail, robbing the DC-10 of its normal controls and forcing the crew to improvise.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>What aircraft was involved in the Flight 232 accident?<\/summary><div class=\"mf-faq-answer\"><p>Flight 232 was a McDonnell Douglas DC-10-10, a wide-body trijet (registration N1819U). The accident exposed a vulnerability in how its three hydraulic systems were routed and led to design and procedure changes. The DC-10 was one of many ambitious <a href=\"https:\/\/migflug.com\/jetflights\/mach-2-to-mach-0-85-why-airliners-slowed-down\/\">airliners of the jet age<\/a>.<\/p><\/div><\/details><\/div>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What happened to United Airlines Flight 232?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"United Airlines Flight 232, a DC-10 flying from Denver to Chicago on July 19, 1989, suffered an uncontained failure of its tail engine that severed all three hydraulic systems, leaving the crew with no normal flight controls. Steering with engine thrust alone, they crash-landed at Sioux City; 185 of the 296 people aboard survived.\"}},{\"@type\":\"Question\",\"name\":\"How did the crew of Flight 232 fly without hydraulics?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"With all hydraulics lost, the crew steered United 232 using differential thrust, varying the power on the two remaining wing engines to turn, climb and descend. Captain Al Haynes was helped by off-duty instructor Captain Dennis Fitch. It was an improvised technique never trained for, comparable in difficulty to other <a href=\\\"https:\/\/migflug.com\/jetflights\/what-happens-fighter-jet-engine-failure-flameout\/\\\">in-flight emergencies pilots face<\/a>.\"}},{\"@type\":\"Question\",\"name\":\"How many people survived United Flight 232?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Of the 296 people aboard United Flight 232 (285 passengers and 11 crew), 185 survived and 111 died. Because the aircraft had lost all hydraulic flight controls, engineers had predicted there would be no survivors at all, making the partially successful landing a celebrated feat of airmanship.\"}},{\"@type\":\"Question\",\"name\":\"What caused the Flight 232 crash?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The disaster began with an uncontained failure of the number-two (tail-mounted) engine's fan disk. Debris from the disintegrating disk cut through all three independent hydraulic systems, which shared a vulnerable routing point in the tail, robbing the DC-10 of its normal controls and forcing the crew to improvise.\"}},{\"@type\":\"Question\",\"name\":\"What aircraft was involved in the Flight 232 accident?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Flight 232 was a McDonnell Douglas DC-10-10, a wide-body trijet (registration N1819U). The accident exposed a vulnerability in how its three hydraulic systems were routed and led to design and procedure changes. The DC-10 was one of many ambitious <a href=\\\"https:\/\/migflug.com\/jetflights\/mach-2-to-mach-0-85-why-airliners-slowed-down\/\\\">airliners of the jet age<\/a>.\"}}]}<\/script><!-- \/mf-faq -->","protected":false},"excerpt":{"rendered":"<p>Quick Facts Flight United Airlines Flight 232, Denver to Chicago Date July 19, 1989 Aircraft McDonnell Douglas DC-10-10 (N1819U) Crew Captain Al Haynes, First Officer Bill Records, Flight Engineer Dudley Dvorak, plus off-duty instructor Captain Dennis Fitch Failure Uncontained failure of #2 (tail) engine fan disk severed all three hydraulic systems Control Method Differential thrust [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":221944,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,670],"tags":[],"class_list":["post-221942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-history-and-legends","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - 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