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1991 Merion mid-air collision
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1991 mid-air collision
February 2025
1991 Merion mid-air collision File:Merion air disaster diagram.png NTSB diagram of the collision Accident 1991 04 04 Mid-air collision due to pilot error on both aircraft Lower Merion Township, Pennsylvania 40.0017 -75.2568 type:event inline,title 7 5 2 5 0 N104RM 1980 Piper AEROSTAR 601P C-N 61P07568063375 (5406371767).jpg 1.15 A Piper Aerostar similar to the one involved in the accident Piper Aerostar N3645D Williamsport Regional Airport Philadelphia International Airport 3 1 2 3 0 Hokkaido Police Bell412EP DAISETSU2.JPG 1.15 A Bell 412EP similar to the one involved in the accident Bell 412 N78S 2 2 2 0
On April 4, 1991, a Piper Aerostar propeller-driven aircraft collided in mid-air with a Bell 412 helicopter over Merion Elementary School in Lower Merion Township, a suburb west of Philadelphia, in southeast Pennsylvania. All five people in both aircraft were killed, including United States Senator John Heinz, the sole passenger of the Piper.https://news.google.com/newspapers?id=3gsQAAAAIBAJ&sjid=WosDAAAAIBAJ&pg=6874%2C697824 Free Lance-Star Fredericksburg, Virginia Associated Press Duncombe Ted Senator, six others killed in crash April 5, 1991 13 On the ground, two schoolchildren were killed by falling debris and five people were injured.https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR9101S.pdf Aircraft Accident/Incident Summary National Transportation Safety Board September 17, 1991 NTSB.gov
An investigation determined the accident was caused by poor crew judgment and pilot error in both aircraft.
Background
John Heinz's aircraft departed from Williamsport Regional Airport (IPT) in central Pennsylvania on the morning of April 4, 1991, at about 10:22 a.m. EST. Heinz was in Williamsport for a press conference pertaining to federal funding of U.S. Route 15.https://www.newspapers.com/article/standard-speaker-heinz-last-stop-was-fo/125548878/ Heinz' last stop was for road funding AP Standard-Speaker Hazleton, Pennsylvania 5 April 5, 1991 May 29, 2023 newspapers.com Heinz hired a twin-engine Piper PA-60-601 Aerostar from Lycoming Air Services, an air taxi operator based at the Williamsport airport. Heinz and his two pilots, both from Lycoming County, departed for Philadelphia International Airport (PHL) slightly before 10:30 a.m.
Crash
As Heinz's aircraft made its approach to Philadelphia International Airport at approximately 12:01p.m., the pilots noticed that the nose landing gear "locked" indicator light was not illuminated. The crew began troubleshooting the problem and alerted air traffic control (ATC). A pilot in the Piper told ATC he could see the apparently extended nose gear reflected in the propeller spinners. Approximately three minutes later, the plane executed a low pass near the tower; the controller reported to the crew that the nose gear appeared to be extended.1,2
The crew of a passing Bell 412SP helicopter, operated by Sun Company Inc. and headed to the company's headquarters in Radnor, Pennsylvania, offered to take a closer look to see if the gear was indeed down and locked. They moved near the Aerostar for a better look, and the final transmission from the helicopter crew was to advise the Aerostar crew that "everything looks good from here".2,3
At 12:10p.m., the two aircraft collided over Merion Elementary in Lower Merion, with the helicopter's rotor blades clipping the Aerostar from underneath, severing a main rotor blade of the helicopter and a main wing panel of the airplane and rendering both aircraft uncontrollable. The helicopter spun out of control and the Aerostar dived to the ground; both caught fire and disintegrated on impact in the elementary school grounds, while children were playing outside during their lunch recess. The Aerostar fell in the school yard near the entrance loop while the Bell fell behind the school building; debris also fell on nearby private residences in a 250 yd on radius around the school. The collision killed all five people on both aircraft, including Heinz. On the ground, two schoolgirls were killed, and five other persons were injured by fire and debris. The school's custodian, John Fowler, and reading specialist Ivy Weeks helped put out the flames that caught on student David Rutenberg's jacket.Pirro J. F. Remembering the John Heinz Tragedy, Twenty-Five Years Later https://mainlinetoday.com/life-style/remembering-the-john-heinz-tragedy-twenty-five-years-later/ Main Line Today 11 April 2016 3 December 2025
Post-crash fires destroyed much of the aircraft wreckage and some landscaping at the school.6 http://articles.baltimoresun.com/1991-04-05/news/1991095117_1_heinz-plane-elementary-school https://web.archive.org/web/20120913071658/http://articles.baltimoresun.com/1991-04-05/news/1991095117_1_heinz-plane-elementary-school Sen. John Heinz killed in plane crash in Philadelphia The Baltimore Sun Larry King April 5, 1991 limited 2012-09-13 - Newer URL
Investigation
A National Transportation Safety Board (NTSB) investigation was opened almost immediately.https://news.google.com/newspapers?id=CdoxAAAAIBAJ&sjid=8uQFAAAAIBAJ&pg=1906%2C1006899 Reading Eagle Pennsylvania Associated Press Heinz crash probe begins April 5, 1991 1 Investigators cited a litany of mistakes and wrong decisions that led to the deaths and injuries. "This was a senseless accident that didn't have to happen," said James L. Kolstad, then-chairman of the NTSB.https://www.newspapers.com/article/the-des-moines-register-pilots-blamed-fo/125529041/ Pilots blamed for crash that killed Heinz, 6 others The Philadelphia Inquirer The Des Moines Register 3 September 18, 1991 May 29, 2023 newspapers.com
In September 1991, the NTSB's finding were announced. It was determined that the poor judgment of both flight crews caused the accident.https://news.google.com/newspapers?id=6LAqAAAAIBAJ&sjid=42MEAAAAIBAJ&pg=2788%2C145215 Pittsburgh Press Bowman Lee Poor judgment of crews blamed in Heinz death September 17, 1991 A1https://news.google.com/newspapers?id=mOFRAAAAIBAJ&sjid=o24DAAAAIBAJ&pg=3699%2C4080840 Pittsburgh Post-Gazette Cushman John H. Jr. The New York Times Bad moves by 2 pilots blamed in Heinz crash September 18, 1991 1https://news.google.com/newspapers?id=I1tWAAAAIBAJ&sjid=5-8DAAAAIBAJ&pg=3009%2C5390676 Spokesman-Review Spokane, Washington wire reports Crash blamed on poor judgment September 18, 1991 A3
The NTSB report stated that visual checks from the helicopter and control tower were pointless because the nose gear doors of the Aerostar partially close when the gear extends, obscuring most of the locking mechanism and making it "virtually impossible" to determine even from an "unsafe distance" whether the nose gear was locked. No useful information could have been provided beyond what the pilots had already determined for themselves by looking at the propeller spinner reflections, the NTSB said, noting that the Aerostar pilots should have realized this due to their presumed familiarity with their own aircraft. The NTSB said that the helicopter crew should have also realized the futility of the task due to the inherent difficulty of seeing fine detail while looking upwards through the Bell's front windshields.15,16 The Bell was equipped with overhead windows, but the operator had painted them over because light flicker from the main rotor had caused pilots to experience vertigo.4
The NTSB criticized the Piper flight manual for lacking explicit procedures to follow if the nose gear indicator light would not illuminate. However, the aircraft was also equipped with a landing gear warning horn that would sound if the throttles were moved to the idle position when the gear was not down and locked; the pilots could have verified whether the gear was locked by reducing throttle at a safe altitude and listening for the horn, which was part of the procedure in the flight manual if the landing gear hydraulics failed. The NTSB could not determine whether this was attempted, as the Aerostar was not equipped with a cockpit voice recorder, but the NTSB concluded from radio communications with controllers that the pilots most likely did not attempt it.14 Even if the procedure was fruitless, the NTSB said that with the nose gear visibly in the down position, a more experienced pilot probably would have still attempted a landing "accepting the possibility that the nose gear could collapse during the landing roll", as such a condition "does not generally result in a major accident or occupant injury".15
The NTSB noted that none of the pilots had any formal experience or training in formation flying; the helicopter pilots had flown close to another helicopter in the past, but at a considerably greater distance than in the accident flight, and it was not known if they had ever flown near a fixed-wing airplane.6 The NTSB said that aerodynamic forces tend to pull aircraft toward one another when one flies immediately above another, and assertive flight control corrections may be required to counteract this; although radar data was inadequate to determine if such an event had in fact occurred, Bell Helicopter engineers confirmed that the 412SP is subject to this tendency. The NTSB faulted the crews of both aircraft for attempting unfamiliar and inherently risky maneuvers over a populated area, as both aircraft had ample fuel, and there was no other factor present that would compel the pilots to finish the inspection quickly. The NTSB recommended that the Federal Aviation Administration (FAA) make a more concerted effort to train pilots to recognize such hazardous situations and exercise better judgment.16–18
Due to collision, ground impact, and fire damage, the NTSB was unable to determine if the Aerostar's nose gear or the nose gear warning systems were functioning properly before the crash.12
Aftermath
thumb|right|upright=.8|U.S. Senator John Heinz
Word of Heinz's death came from his Washington office. At midafternoon, sobbing members of his staff began walking out of his office in the Russell Senate Office Building. A few minutes later, the senator's legislative director, Richard Bryers, announced Heinz's death to reporters.https://www.newspapers.com/article/the-morning-call-capitol-hill-staffers-g/125532222/ Capitol Hill staffers grapple with reality of their boss's death Nicole Weisensee States News Service The Morning Call Allentown, Pennsylvania 8 April 5, 1991 May 29, 2023 newspapers.com
News of Heinz's death at age 52 shocked fellow lawmakers:
Senator Tim Wirth of Colorado stated that he and his wife, Wren, considered Heinz and his wife, Teresa, "our dearest friends in the Senate," and paid tribute to his "intense intelligence, sparkling charm, and broad vision."https://www.newspapers.com/article/arizona-republic-air-crash-kills-sen-hei/125531634/ Air crash kills Sen Heinz, 6 others Republic Wire Services The Arizona Republic 2 April 5, 1991 May 29, 2023 newspapers.com - Clipping of the first page, on page 1
Senate Minority Leader Bob Dole of Kansas called Heinz "a dynamic and dedicated public servant, a tireless champion for Pennsylvania and a good and decent family man".https://www.newspapers.com/article/the-kansas-city-star-area-delegates-mour/125531804/ Senator, 6 others killed in crash St. Petersburg Times 3 April 5, 1991 May 29, 2023 newspapers.com
Vice President Dan Quayle, in Los Angeles for a speech, said: "We are going to miss John Heinz tremendously. He made a tremendous contribution to the U.S. Senate."https://www.newspapers.com/article/the-los-angeles-times-sen-heinz-six-ot/125532052/ Sen. Heinz, Six Other Die as Plane, Copter Collide, Crash in Schoolyard Karen Tumulty Paul Houston Los Angeles Times A37 April 5, 1991 May 29, 2023 newspapers.com - HTML copy
The crash received multi-national attention, with reports appearing in multiple regions including the United Kingdom, France, Germany, Canada, and Australia.https://www.newspapers.com/article/the-daily-telegraph-crash-kills-heinz-he/125532390/ Crash kills Heinz heir Ian Ball The Daily Telegraph London 12 April 5, 1991 May 29, 2023 newspapers.comhttps://www.newspapers.com/article/the-age-us-senator-killed/125532608/ US senator killed AP The Age Melbourne 8 April 6, 1991 May 29, 2023 newspapers.com Flights over Merion Elementary School during school hours were informally banned for a period of time, and media avoided flying news or traffic helicopters over the school.http://www.mainlinetoday.com/Main-Line-Today/April-2016/Remembering-the-John-Heinz-Tragedy-Twenty-Five-Years-Later/ Remembering the John Heinz Tragedy, Twenty-Five Years Later J. F. Pirro Main Line Today April 11, 2016
Heinz's funeral was held in Pittsburgh,Coverage of Heinz funeral set https://news.google.com/newspapers?id=wuFRAAAAIBAJ&pg=5651,2430655&dq=john+heinz+funeral+heinz+chapel&hl=en September 11, 2012 Pittsburgh Post-Gazette April 10, 1991 and a memorial service in Washington was attended by President George H. W. Bush and Vice President Quayle.Bush, Quayle go to Heinz funeral https://news.google.com/newspapers?id=qFxKAAAAIBAJ&pg=1465,2483130&dq=john+heinz+funeral+senate&hl=en September 11, 2012 The Press-Courier April 13, 1991 The nearby Tinicum National Wildlife Refuge was renamed for Heinz, who had played a role in its preservation.
References
30em
External links
NTSB report
Category:Aviation accidents and incidents in the United States in 1991
Category:1991 in Pennsylvania
Category:Mid-air collisions involving general aviation aircraft
Category:Mid-air collisions involving helicopters
Category:Mid-air collisions in the United States
Category:April 1991 in the United States
Category:Aviation accidents and incidents caused by pilot error
Category:Lower Merion Township, Pennsylvania
Category:Aviation accidents and incidents involving the Bell 412