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Safety Recommendation Details

Safety Recommendation A-93-141
Details
Synopsis: ON MARCH 31, 1993, THE NO.2 ENGINE AND ENGINE PYLON SEPARATED FROM JAPAN AIRLINES, INC., FLIGHT 46E, A BOEING 747-121, THAT HAD BEEN WET-LEASED FROM EVERGREEN INTERNATIONAL AIRLINES, INC., SHORTLY AFTER DEPARTURE FROM ANCHORAGE INTERNATIONAL AIRPORT, ANCHORAGE, ALASKA. THE ACCIDENT OCCURRED ABOUT 1234 ALASKA STANDARD TIME. THE FLIGHT WAS A SCHEDULED CARGO FLIGHT FROM ANCHORAGE TO CHICAGO-O'HARE INTERNATIONAL AIRPORT, CHICAGO, ILLINOIS. ON BOARD THE AIRPLANE WERE THE FLIGHTCREW, CONSISTING OF THE CAPTAIN, THE FIRST OFFICER, AND THE SECOND OFFICER, AND TWO NONREVENUE COMPANY EMPLOYEES. THE AIRPLANE WAS SUBSTANTIALLY DAMAGED DURING THE SEPARATION OF THE ENGINE. NO ONE ON BOARD THE AIRPLANE OR ON THE GROUND WAS INJURED.
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: CONSIDER THE NECESSITY AND FEASIBILITY OF REQUIRING THE MODIFICATION OF THE AIRCRAFT DEPARTURE ROUTES AT ANCHORAGE INTERNATIONAL AIRPORT DURING PERIODS OF MODERATE OR SEVERE TURBULENCE TO MINIMIZE THE POTENTIAL OF AIRCRAFT ENCOUNTERING MOUNTAIN-INDUCED LOW LEVEL TURBULENCE.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: ANCHORAGE, AK, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA93MA033
Accident Reports: In-Flight Engine Separation Japan Airlines, Inc., Flight 46E Boeing 747-121, N473EV
Report #: AAR-93-06
Accident Date: 3/31/1993
Issue Date: 11/15/1993
Date Closed: 6/17/1994
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s): Weather, Turbulence

Safety Recommendation History
From: NTSB
To: FAA
Date: 6/17/1994
Response: THE BOARD NOTES THAT THE FAA REVIEWED THE STANDARD INSTRUMENT DEPARTURES FROM RUNWAYS 6L & 6R OF THE ANCHORAGE INTERNATIONAL AIRPORT & DETERMINED THAT IT WAS NOT POSSIBLE TO MODIFY THESE DEPARTURE ROUTES DUE TO THE LIMITED AMOUNT OF AIRSPACE AVAILABLE, THE CLOSE PROXIMITY OF TWO OTHER AIRPORTS, TERRAIN CLEARANCE CLIMB CRITERIA, & NOISE COMPATIBILITY. FURTHERMORE, THE EXITING PROCEDURES TAKE ALL OF THESE FACTORS INTO CONSIDERTION. BASED ON THIS INFO, THE BOARD CLASSIFIES A-93-141 "CLOSED--ACCEPTABLE ACTION."

From: FAA
To: NTSB
Date: 2/24/1994
Response: THE FAA REVIEWED THIS RECOMMENDATION & DETERMINED THAT MODIFICATION OF THE STANDARD INSTRUMENT DEPARTURES FROM RUNWAYS 6L & 6R IS NOT FEASIBLE DUE TO THE LIMITED AMOUNT OF AIRSPACE AVAILABLE, THE CLOSE PROXIMITY OF TWO OTHER AIRPORTS, TERRAIN CLEARANCE CLIMB CRITERIA, AND NOISE COMPATIBILITY. THE EXISTING PROCEDURES TAKE ALL OF THESE FACTORS INTO CONSIDERATION. THE FAA ACTION CONSIDERS THEIR ACTION TO BE COMPLETED, & THEY PLAN NO FURTHER ACTION ON THIS RECOMMENDATION.