Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation A-91-092
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: REQUIRE THAT THE FLIGHT MANUAL FOR THE PIPER AEROSTAR PA-60 BE MODIFIED SO THAT THE EMERGENCY PROCEDURES SECTION INCLUDES INFORMATION ON ACTIONS TO BE TAKEN IN THE EVENT OF AN UNSAFE LANDING GEAR INDICATION.
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: 4/29/1996
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 4/29/1996
Response: THE BOARD NOTES THAT THE AEROSTAR AIRCRAFT CORPORATION HAS ISSUED AN ADDENDUM TO THE EMERGENCY SECTION OF THE AEROSTAR FLIGHT MANUAL THAT PROVIDES EXPLICIT INSTRUCTIONS ON ACTIONS TO BE TAKEN IN THE EVENT OF AN UNSAFE LANDING GEAR INDICATION. ADDITIONALLY, THE BOARD NOTES THAT COPIES OF THIS ADDENDUM HAVE BEEN MAILED TO ALL OWNERS OF THE PIPER AEROSTAR PA-60 SERIES. BECAUSE THIS ACTION FULLY COMPLIES WITH THE INTENT OF THE RECOMMENDATION, THE BOARD CLASSIFIED A-91-92 "CLOSED--ACCEPTABLE."

From: FAA
To: NTSB
Date: 3/6/1996
Response: THE AEROSTAR AIRCRAFT CORPORATION HAS ISSUED AN ADDENDUM TO THE EMERGENCY SECTION OF THE AEROSTAR MANUAL PROVIDES EXPLICIT INSTRUCTIONS IN THE EVENT OF AN UNSAFE LANDING GEAR INDICATION. COPIES OF THIS ADDENDUM HAVE BEEN MAILED TO ALL OWNERS OF THE PIPER AEROSTAR PA-60 SERIES.

From: NTSB
To: FAA
Date: 5/28/1992
Response: We note that the FAA has asked Piper to develop new emergency procedures in the General Aviation Manufacturers Association's format for incorporation into the next revision of the airplane flight manual. Pending implementation of such action, this recommendation is classified as "Open--Acceptable Response."

From: NTSB
To: FAA
Date: 5/8/1992
Response: In Safety Recommendation A-91-92 we asked the FAA to require that the flight manual for the Piper Aerostar PA-60 be modified so that the emergency procedures section includes information on actions to be taken in the event of an unsafe landing gear indication. We note that the FAA is reviewing this safety recommendation, which is classified as "Open--Await Response."

From: FAA
To: NTSB
Date: 4/24/1992
Response: THE FAA HAS ASKED AEROSTAR TO DEVELOP NEW EMERGENCY PROCEDURES IN GAMA'S FORMAT FOR INCORPORATION IN THE NEXT REVISION OF THE AIRPLANE FLIGHT MANUALS.

From: FAA
To: NTSB
Date: 12/27/1991
Response: THE FAA IS IN THE PROCESS OF REVIEWING THIS SAFETY RECOMMENDATION AND WILL APPRISE THE BOARD OF ITS COURSE OF ACTION AS SOON AS THE REVIEW IS COMPLETED.