DALLAS - Nearly a dozen people reported being injured in the last five years while riding the Texas roller coaster from which a woman fell to her death last week, though the most serious injuries appear to be a concussion and muscles strains due to jostling, state records show.

Six Flags Over Texas reported 14 injuries involving the Texas Giant roller coaster between April 2008 and April 2013, according to Texas Department of Insurance records. Three of those injuries happened either before or after the ride, such as tripping on the steps leading to the roller coaster.

It wasn't immediately clear how many of those injuries prompted the ride to be shut down, department spokesman Jerry Hagins said. If an injury requires medical attention and involved the actual ride, the ride must be closed until it gets a new safety inspection, he said.

"Our role is to make sure that happens," Hagins said, adding that the Texas Giant was currently closed and wouldn't reopen until the department sees a new safety inspection report.

Amusement park safety analyst Ken Martin noted that such injuries are self-reported, so it's hard to gauge their accuracy. He also said such numbers don't include "near-misses."

"The numbers that we hear about are typically the tip of the iceberg," he said.

Walter Reiss, an amusement park ride safety inspector, added that fatal accidents on roller coasters "are very unusual and infrequent."

"Most times that you have death accidents, it was something either ignorant or human error," he said.

The investigation is ongoing into how Rosa Ayala-Goana fell while riding the roller coaster Friday evening at the Six Flags amusement park in Arlington, a western suburb of Dallas. A witness told local media that Ayala-Goana expressed concern moments before the 14-story ride began that the safety bar had not completely engaged.

The Tarrant County medical examiner's office confirmed Monday that the 52-year-old Dallas resident was the victim in the accident, and that she suffered "multiple traumatic injuries" during the fall.

A man who identified himself as Ayala-Goana's son declined comment Monday when approached at her home.

Six Flags Entertainment Corp. President and CEO Jim Reid-Anderson said Monday that company was using "both internal and external experts" to investigate the accident, but he offered no details during a conference call to discuss the company's earnings.

In an email to The Associated Press later Monday, Six Flags spokeswoman Sharon Parker said the company "will not release any details pertaining to the investigation until it is complete."

Meanwhile, Six Flags has temporarily closed the Iron Rattler roller coaster at its Six Flags Fiesta Texas in San Antonio. The decision came late Friday after officials heard about the accident in Arlington, Fiesta Texas spokeswoman Sydne Purvis said Monday.

Purvis said it's a precautionary move until the Texas Giant investigation is completed. Both roller coasters are wooden structures with steel rails.

The Texas Giant first opened in 1990 as an all-wooden coaster but underwent a $10 million renovation in 2010 to install steel-hybrid rails before reopening in 2011. The coaster, which can carry as many as 24 riders, has a drop of 79 degrees and a bank of 95 degrees.

Reiss, the amusement park expert, speculated that either Ayala-Goana managed to slip out from behind a locked mechanism or that the harness mechanism failed and it opened.

"Right now, I would say investigators are probably tearing apart every inch of that train and every harness mechanism, and inspecting and testing every millimeter of those harness mechanisms to find out whether the potential even exists for her harness to have failed or for any other harness to have failed," Reiss said.

"At the end of the day, it comes down to whether or not the person fits," he added. "If the harness locks normally, without forcing it, it's OK. And the final say is up to the ride operator to tell you, 'I'm sorry, you can't ride.'"

The roller coaster was issued its most recent safety permit in February and was in compliance with state regulations that require an annual inspection by a qualified engineer, according to state records. Proof of those inspections also must be submitted to the Texas Department of Insurance.

Hagins noted that Texas has an insurance-based regulatory system for amusement park rides and that the ride also was in compliance with rules that require $1 million liability insurance.

The Dallas Morning News has reported that officials with the roller coaster's car manufacturer, Gerstlauer Amusement Rides in Germany, were set to come to Texas to inspect the ride. The company could not be reached late Monday by phone and an email was not immediately returned.

Don Hankins, of Lakeland, Fla.-based PLH & Associates, Inc., who inspected the roller coaster in February, did not return a call to The Associated Press on Monday.

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Associated Press reporters Betsy Blaney in Lubbock, Uriel J. Garcia and Nomaan Merchant in Dallas and David R. Martin in New York contributed to this report.

Earlier on HuffPost:

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  • Kingda Ka

    Looming over Six Flags Great Adventure in Jackson, New Jersey, the Kingda Ka is the world’s tallest roller-coaster at 456 feet (139 metres) with a petrifying 418-foot drop (127 metres). It is also the second fastest coaster in the world with top speeds reaching 206 km/h (128 mph) in just 3.5 seconds.

  • Formula Rossa

    For those with a need for speed, the Formula Rossa at Ferrari World in Abu Dhabi is the world’s fastest coaster with a top speed of 240 km/h (150 mph) reached in just under 5 seconds. Those daring enough to tackle this wild coaster must don safety goggles to shield their eyes from insects and other debris, while being whipped through the air.

  • Steel Dragon 2000

    The Steel Dragon 2000 at Nagashima Spa Land amusement park in Mie Prefecture, Japan, is for those who just don’t want the excitement to end. It holds the record for having the longest track length at about 8,133 feet (2,479 metres). Unlike other coasters that are over in seconds, Steal Dragon 2000 lasts about 4 minutes and includes a heart-stopping 306-foot drop (93 metres).

  • Colossus

    If twists, turns and loops are what get your blood pumping, this monster of a coaster is for you. The Colossus at Thorpe Park in Surrey, England boasts 10 stomach-churning inversions, including a vertical loop, cobra rolls, corkscrews and heartline twists. Along with its replica, the 10 Inversion Roller Coaster in Guangzhou, Guangdong China, Colossus holds the record for the coaster with the most inversions.

  • The Takabisha

    Located at the Fuji-Q Highland theme park in Fujiyoshida, Yamanashi, Japan, the Takabisha is sure to take your breath away. This coaster is famous for its 121-degree drop -- the steepest in the world. Not enough thrills for you? Then try its seven, hair-raising inversions.

  • The Voyage

    This wooden coaster at Holiday World & Splashin' Safari in Santa Claus, Indiana is known for its high amount of airtime -- that sinking feeling you experience in your stomach when plummeting down a hill. Riders can expect about 24 seconds of airtime on The Voyage.

  • Griffon

    The Griffon at Busch Gardens in Williamsburg, Virginia, is the world’s tallest, floorless dive coaster. Riders experience a 90-degree free-fall from 205 feet, while their limbs dangle in the air.

  • Top Thrill Dragster

    "Race for the Sky" is the tagline for this soaring coaster at Cedar Point in Sandusky, Ohio. Top Thrill Dragster is the second tallest coaster in the world. In a matter of seconds, riders are hurled 420 feet (128 metres) in the air before crashing down to the finish line.

  • Superman: Escape from Krypton

    Superman: Escape from Krypton at Six Flags Magic Mountain in Valencia, California begins by firing riders backward at 160 km/h (100 mph) and straight up a 41-story tower. Riders are then plunged 415 feet (126 metres) back to earth, while hanging face first.

  • El Toro

    This wooden roller-coaster at Six Flags Great Adventure in Jackson, New Jersey is ranked first in the world for being the fastest (110 km/h) and features the longest drop for a wooden coaster at 176 ft (54 m).

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  • Steel Dragon 2000, Japan

    <strong>Where: </strong>Nagashima Spa Land in Mie Prefecture. <strong>Scary Stat: </strong>Slow climb to a 306-foot drop. It takes nerves of steel to sit calmly through what feels like the most suspenseful 1:15 minutes of your life as this coaster gradually climbs to the top of the first hill before dropping 306 feet. Built in 2000, the year of the dragon, the world’s longest coaster stretches on for 8,133 feet—an endurance test of marathon-like proportions—and you’ve got no choice but to wait it out for all four minutes. <a href="http://www.flickr.com/photos/paulkelly/" class="external" rel="nofollow">Photo by Paul and Kelly</a> <strong>Plus: <a href="http://www.travelandleisure.com/articles/worlds-scariest-roads" target="_hplink">World's Scariest Roads</a></strong>

  • Kingda Ka, New Jersey

    <strong>Where:</strong> Six Flags Great Adventure in Jackson. <strong>Scary Stat:</strong> 456-foot drop. At 45 stories, the Kingda Ka is the tallest roller coaster on earth—closer to the sky than any Egyptian pyramid—and among the fastest, reaching 128 mph. It’s also one of only two existing Stratacoasters, rides that plummet more than 400 feet. (The other is Cedar Point’s intimidating Top Thrill Dragster.) Kingda Ka shoots riders around an upside-down U track in just 59 heart-stopping seconds. Except when it doesn’t. Beware of rollbacks, when, occasionally, the coaster doesn’t gather enough momentum to pump itself over the very top and plummets backward, forcing riders to experience the launch all over again. Photo by Andrew Barrett <strong>Plus: <a href="http://www.travelandleisure.com/articles/worlds-scariest-hikes" target="_hplink">World's Scariest Hikes</a></strong>

  • Bizzaro, Massachusetts

    <strong>Where: </strong>Six Flags, New England in Agawam. <strong>Scary Stat:</strong> 221-foot drop into a tunnel. Named after Superman’s evil twin, this imposing coaster rules Six Flags New England’s skyline. It rises 208 feet only to fall 221 into a dark tunnel brimming with fog. Coaster enthusiasts love it because it packs in a lot of “airtime,” that out-of-control feeling you get when your guts fly up into your chest. The cars themselves contribute to the fear factor because the sides come up only to riders’ ankles, creating a major sense of vulnerability. <a href="http://www.sixflags.com/greatAdventure/index.aspx" class="external" rel="nofollow">Photo Courtesy of Six Flags</a> <strong>Plus: <a href="http://www.travelandleisure.com/articles/the-worlds-scariest-train-rides" target="_hplink">World's Scariest Train Rides</a></strong>

  • Colossus, England

    <strong>Where: </strong>Thorpe Park in Surrey. <strong>Scary Stat: </strong>10 inversions. It’s unwise to board the Colossus after lunch. Riders endure a record of 10 disorienting loops in under two minutes, including a vertical loop, a “cobra roll,” and five “heartline twists.” The last one’s also heart-wrenching—it comes right when you think you’re pulling into the station. Coaster fans and reviewers warn that Colossus is rough, so keep your head forward and ride in the last car only if you’re in the mood to be punished. <a href="www.flickr.com/photos/coastermadmatt/collections/" class="external" rel="nofollow">Photo by Matthew Wells</a> <strong>Plus: World's Scariest Bridges</strong>

  • Formula Rossa, United Arab Emirates

    <strong>Where: </strong>Ferrari World in Abu Dhabi. <strong>Scary Stat: </strong>149 mph. Constructed above Abu Dhabi’s Formula One racetrack, the world’s fastest coaster aims to re-create the sensation of racing in a red Ferrari. It uses a hydraulic launch system similar to the kind that propels fighter jets off aircraft carriers to accelerate from 0 to 60 mph in the first two seconds. The coaster can’t maintain its top speed of 149 mph for long, but front-seat riders still have to wear the same protective glasses used by skydivers. <a href="http://www.danfreemanphotography.com/" class="external" rel="nofollow">Photo by Dan Freeman</a> <strong>Plus: <a href="http://www.travelandleisure.com/articles/worlds-scariest-ski-slopes" target="_hplink">World's Scariest Ski Slopes</a></strong>

  • Phantom’s Revenge, Pennsylvania

    <strong>Where:</strong> Kennywood Park in Pittsburgh. <strong>Scary Stat:</strong> 232-foot drop under another coaster. The Phantom’s Revenge owes its nasty reputation to its infamous second hill, which plunges riders 232 feet into a ravine and underneath the support structure of another coaster, creating the impression that the rider will be, well, decapitated. Most riders have no inkling of the terror that awaits them because it’s impossible to see the bottom of the drop unless you’re already on the ride. <a href=" http://thelonebeader.com/Home.html" class="external" rel="nofollow">Photo by thelonebeader.com</a> <strong>Plus: <a href="World's Scariest Taxi Rides" target="_hplink">World's Scariest Taxi Rides</a></strong>

  • Intimidator 305, Virginia

    <strong>Where:</strong> King’s Dominion in Doswell. <strong>Scary Stat:</strong> 305 feet in no time. Intimidator 305 was voted the Best Coaster of 2010 by <em>Amusement Today</em>, and Scott Rutherford, a senior writer and editor, says the “massively tall and imposing” Intimidator 305  “whips your butt with pure intensity.” The Intimidator races you up its first, 305-foot hill in a matter of 20 seconds and reaches up to 94 mph. Often compared to Cedar Point’s Millennium Force, the I305 is considered by many to be that coaster’s meaner cousin. <a href="http://www.flickr.com/photos/emilymcdonald" class="external" rel="nofollow">Photo by Emily McDonald</a> <strong>Plus: <a href="http://www.travelandleisure.com/articles/worlds-scariest-borders" target="_hplink">World's Scariest Borders</a></strong>

  • Expedition GeForce, Germany

    <strong>Where:</strong> Holiday Park in Hassloch. <strong>Scary Stat:</strong> 82-degree-angle hill. “Roller Coaster King” Richard Rodriquez didn’t just inherit that title. He rode the Expedition GeForce for 49 days back-to-back, setting the Guinness world record for longest continual coaster ride. Built in celebration of Holiday Park’s 30-year anniversary in 2001, this coaster will make you feel weightless—seven times. The coaster delivers steep thrills, tossing you down a 184-foot, 82-degree-angle hill. In 2010, the GeForce’s fourth car mysteriously derailed after the first drop, and passengers had to be rescued by firefighters, though no one was seriously harmed. Photo by Robin Schroder <strong>Plus: World's Scariest Runways</strong>

  • El Toro, New Jersey

    <strong>Where: </strong>Six Flags Great Adventure in Jackson. <strong>Scary Stat:</strong> Nine instances of airtime. El Toro has a cheesy matador theme and, at 188 feet, it’s well below the heights of adjacent Kingda Ka. But when a roller coaster expert says it’s “one of the scariest rides I’ve been on,” you take heed. Scott Rutherford, a senior writer and editor at Amusement Today, loves this coaster because of its sheer intensity and nine moments of airtime. “That’s what we live for,” he says. At a record-breaking 76 degrees, the coaster also boasts the steepest drop ever on a wooden coaster in America. <a href="http://www.flickr.com/photos/amylovesyah/4846346877/" class="external" rel="nofollow">Photo by Amy Goldstein</a>

  • Tower of Terror II, Australia

    <strong>Where:</strong> Dreamworld in Gold Coast, Queensland. <strong>Scary Stat:</strong> 377 feet high. Don’t get Australia’s Tower of Terror confused with the tame Disney World ride by the same name: this coaster’s tagline is “Face Gravity, Face First.” Hold on tight as the fastest and tallest coaster in the Southern Hemisphere shoots you backward up the tower in just seven seconds, dangles you in the air for a few more, and then drops you back to earth at a 90-degree angle and at 100 mph. The total experience is just 27 seconds long, but it’s worth every minute spent waiting in line. Photo Courtesy of Tower of Terror II, Dreamworld, Gold Coast, Australia

  • The Coney Island Cyclone, New York

    <strong>Where:</strong> Coney Island. <strong>Scary Stat:</strong> 80-year-old wooden frame. Nothing makes you feel safer than finding out the coaster you’re about to ride is a historical landmark, right? Dating to 1927, the Coney Island Cyclone is “the coaster against which all others are measured,” and “the grandaddy of them all,” according to Scott Rutherford of Amusement Today. He says experiencing the aggressive, not-entirely-predictable throttle of the Cyclone is “like a mugging.” So it’s fitting that the video game Grand Theft Auto IV features a coaster that’s almost an exact replica. <a href="http://darcystrobelphoto.tumblr.com/" class="external" rel="nofollow">Photo by Darcy Strobel</a>

  • Dodonpa, Japan

    <strong>Where:</strong> Fuji-Q Highland in Fujiyoshida, Yamanashi. <strong>Scary Stat:</strong> 0 to 107 mph in 1.8 seconds. The Dodonpa combines record-breaking speed and psychological torture. When it debuted in 2001, it was the fastest coaster in the world, and it still holds the record for fastest launch acceleration, propelling riders from 0 to 107 mph in 1.8 seconds. If you understand Japanese, be prepared for some mind games. A voice over the loudspeaker counts down to launch; sometimes there is a “failed” launch followed by an “accidental” launch to surprise riders. You’ll catch a glimpse of Mount Fuji in the background—if you can keep your eyes open. Photo by Anna Armstrong