Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation A-91-094
Details
Synopsis: ON APRIL 4, 1991, AROUND 12:10 EASTERN STANDARD TIME, A LYCOMING AIR SERVICES PIPER PA-60, N3645D, AND A BELL HELICOPTER, MODEL 412, N78S OPERATED BY SUN COMPANY AVIATION DEPARTMENT, WERE INVOLVED IN A MIDAIR COLLISION OVER LOWER MERION TOWNSHIP, PENNSYLVANIA. THE FLIGHTCREWS ABOARD THE AIRCRAFT, INCLUDING THE PASSENGER ABOARD THE AIRPLANE, WERE FATALLY INJURED. THERE WERE NO PASSENGERS ABOARD THE HELICOPTER. THE AIRCRAFT CRASHED ONTO THE GROUNDS OF AN ELEMENTARY SCHOOL, FATALLY INJURING TWO CHILDREN AND SERIOUSLY INJURING ONE CHILD. FOUR OTHER PERSONS RECEIVED MINOR INJURIES.
Recommendation: THE NTSB RECOMMENDS THAT THE NATIONAL BUSINESS AIRCRAFT ASSOCIATION (NBAA), THE HELICOPTER ASSOCIATION INTERNATIONAL (HAI), AND THE AIRCRAFT OWNERS AND PILOTS ASSOCIATION (AOPA): ADVISE YOUR MEMBERS OF THE CIRCUMSTANCES OF THE MIDAIR COLLISION INVOLVING BELL HELICOPTER N78S AND PIPER AEROSTAR N3645D AND OF THE POTENTIAL DANGERS ASSOCIATED WITH PERFORMING IN-FLIGHT INSPECTIONS OF OTHER AIRCRAFT OR OTHER CLOSE PROXIMITY MANEUVERS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: MERION, PA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA91MA031AB
Accident Reports: ​Midair Collision involving Lycoming Air Services Piper Aerostar PA-60 and Sun Company Aviation Department Bell 412
Report #: AAR-91-01-SUM
Accident Date: 4/4/1991
Issue Date: 10/11/1991
Date Closed: 3/9/1992
Addressee(s) and Addressee Status: Aircraft Owners and Pilots Association (Closed - Acceptable Action)
Helicopter Association International (Closed - Acceptable Action)
National Business Aviation Association (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: National Business Aviation Association
Date: 3/9/1992
Response:

From: National Business Aviation Association
To: NTSB
Date: 10/25/1991
Response: NBAA WILL PUBLISH THE ACCIDENT CIRCUMSTANCES AND POTENTIAL DANGERS ASSOCIATED WITH PERFORMING INFLIGHT INSPECTIONS OF OTHER AIRCRAFT OR CLOSE PROXIMITY MANEUVERS IN THE NEXT EDITION OF ITS MAINTENANCE AND OPERATIONS BULLETIN. THE BULLETIN WILL BE PUBLISHED IN EARLY DECEMBER 1991.

From: NTSB
To: Aircraft Owners and Pilots Association
Date: 3/9/1992
Response: Recommendation A-91-94 issued on October 11, 1991. We asked you to advise your members of the! circumstances of the midair collision involving Bell Helicopter model 412, N78S, and Piper Aerostar, N3645D, and of the potential dangers associated with performing in-flight inspections of other aircraft or other close proximity maneuvers. The Safety Board has reviewed the article, "A Midair Over Philadelphia," which was published in the January 1992 issue of the AOPA PILOT. We also understand that the AOPA's Air Safety Foundation, has developed an ongoing program addressing the potential for midair collisions and how to avoid them. This educational program includes an informative pamphlet and a videotape, which members may purchase or borrow from the association. We appreciate the actions taken by you and your staff to ~allow through on this recommendation. Therefore, Safety Recommendation A-91-94 is classified as CLOSED—ACCEPTABLE ACTION.

From: Aircraft Owners and Pilots Association
To: NTSB
Date: 1/29/1992
Response: (RESPONSE BY TELEPHONE MR. H. RAZA) THE AOPA'S AIR SAFETY FOUNDATION HAS AN ONGOING PROGRAM DEVELOPED DISCUSSING THE POTENTIAL FOR MIDAIR COLLISIONS AND HOW TO AVOID THEM. THIS EDUCATIONAL PROGRAM INCLUDES AN INFORMATIVE PAMPHLET AND A VIDEO TAPE WHICH MEMBERS MAY PURCHASE OR BORROW FROM THE ASSOCIATION.

From: NTSB
To: Helicopter Association International
Date: 3/9/1992
Response:

From: Helicopter Association International
To: NTSB
Date: 11/15/1991
Response: HAI HAS NOTIFIED ITS MEMBERS OF THE RECOMMENDATION BY LETTER AND ALSO PROVIDED WIDER CIRCULATION TO THE HELICOPTER INDUSTRY THROUGH THE SAFETY & FLIGHT OPERATIONS UPDATE ARTICLE IN THE WINTER ISSUE OF ROTOR MAGAZINE. HAI, THROUGH ITS SAFETY/FLIGHT OPERATIONS OFFICE, WILL ALSO INCLUDE A DISCUSSION OF A-91-94 AND AERONAUTICAL DECISION MAKING IN THE HAI SAFETY MANAGEMENT COURSE AND THE HAI PILOT HUMAN FACTORS SAFETY COURSE (HELI-EXPO '92, MARCH 19-20, 1992). ADDITIONALLY, HAI HIGHLIGHTED THIS RECOMMENDATION DURING A REVIEW OF THE "BACK-TO-BASIC" ACCIDENT PREVENTION PROGRAM WITH EMPHASIS ON AERONAUTICAL DECISION MAKING IN THE NOVEMBER ISSUE OF HAI'S "OPERATIONS UPDATE" AND "PRELIMINARY ACCIDENT PREVENTION PROGRAM WITH EMPHASIS ON AERONAUTICAL DECISION MAKING IN THE NOVEMBER ISSUE OF HAI'S "OPERATIONS UPDATE" AND "PRELIMINARY ACCIDENT REPORTS."