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Safety Recommendation Details

Safety Recommendation A-91-091
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 FEDERAL AVIATION ADMINISTRATION: INCLUDE IN THE AIRMAN'S INFORMATION MANUAL ADVISORIES ON THE POTENTIAL DANGERS THAT CAN BE ENCOUNTERED WHEN FLYING AIRCRAFT IN CLOSE PROXIMITY TO ONE ANOTHER. THIS INFORMATION SHOULD INCLUDE CONSIDERATION OF THE POTENTIAL RISKS INVOLVED IN THE MANEUVER, THE IMPORTANCE OF THOROUGH PLANNING AND COMMUNICATION AMONG ALL THE PILOTS AND THE AERODYNAMIC INTERACTIONS THAT CAN BE ENCOUNTERED IN CLOSE PROXIMITY FLIGHT.
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: 9/22/1992
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 9/22/1992
Response: THE SAFETY BOARD NOTES THAT THE FAA ISSUED A REVISION TO THE AIM TO INCLUDE PARAGRAPH 7-87, EMERGENCY AIRBORNE INSPECTION OF OTHER AIRCRAFT. THIS PARAGRAPH DISCUSSES THE POTENTIAL RISKS ENCOUNTERED WHEN FLYING AIRCRAFT IN PROXIMITY TO ONE ANOTHER, THE IMPORTANCE OF THOROUGH PLANNING AND COMMUNICATION AMONG ALL PILOTS DURING SUCH MANEUVERS, AND THE AERODYNAMIC INTERACTIONS BETWEEN TWO AIRCRAFT THAT CAN BE ENCOUNTERED WHEN THE AIRCRAFT ARE FLOWN CLOSE TOGETHER. BASED ON THIS INFORMATION, SAFETY RECOMMENDATION A-91-91 IS CLASSIFIED AS "CLOSED--ACCEPTABLE ACTION." THE SAFETY BOARD IS PLEASED AT THE PROMPT ACTION TAKEN BY THE FAA CONCERNING THIS SAFETY RECOMMENDATION.

From: FAA
To: NTSB
Date: 6/30/1992
Response: THE FAA ISSUED A REVISION TO THE AIRMAN'S INFORMATION MANUAL (AIM) TO INCLUDE PARAGRAPH 7-87, EMERGENCY AIRBORNE INSPECTION OF OTHER AIRCRAFT. THIS PARAGRAPH DISCUSSES THE POTENTIAL RISKS ENCOUNTERED WHEN FLYING AIRCRAFT IN CLOSE PROXIMITY TO ONE ANOTHER, THE IMPORTANCE OF THOROUGH PLANNING AND COMMUNICATION AMONG ALL PILOTS DURING SUCH MANEUVERS, AND THE AERODYNAMIC INTERACTIONS THAT CAN BE ENCOUNTERED IN CLOSE PROXIMITY FLIGHT.

From: NTSB
To: FAA
Date: 5/8/1992
Response: In Safety Recommendation A-91-91 we asked the Federal Aviation Administration (FAA) to include in the Airman's Information Manual (AIM) advisories on the potential dangers that can be encountered when flying aircraft close together. This information should include consideration of the potential risks involved in the maneuver, the importance of thorough planning and communication among pilots, and the aerodynamic interactions that can be encountered in close proximity flight. The Safety Board is pleased that the FAA agrees with this safety recommendation and is developing a change to the AIM. Pending the FAA's further response, this safety recommendation is classified as "Open--Acceptable Response."

From: FAA
To: NTSB
Date: 12/27/1991
Response: THE FAA AGREES WITH THE INTENT OF THIS SAFETY RECOMMENDATION AND IS DEVELOPING A CHANGE TO THE AIRMAN'S INFORMATION MANUAL (AIM), WHICH WILL INCLUDE INFORMATION ON THE POTENTIAL RISKS ENCOUNTERED WHEN FLYING AIRCRAFT IN CLOSE PROXIMITY TO ONE ANOTHER, THE IMPORTANCE, OF THOROUGH PLANNING AND COMMUNICATION AMONG ALL PILOTS DURING SUCH MANEUVERS, AND THE AERODYNAMIC INTERACTIONS THAT CAN BE ENCOUNTERED IN CLOSE PROXIMITY FLIGHT.