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Safety Recommendation Details

Safety Recommendation A-71-034
Details
Synopsis: A MISSISSIPPI VALLEY AIRWAYS, INC., DEHAVILLAND DHC-6, N956SM, CRASHED AT LA CROSSE, WISCONSIN, ON NOVEMBER 9, 1970, AT APPROXIMATELY 1608 CENTRAL STANDARD TIME WHILE EXECUTING A NONPRECISION INSTRUMENT APPROACH IN INSTRUMENT FLIGHT CONDITIONS. THE AIRCRAFT STRUCK TREES APPROXIMATELY 4,000 FEET FROM THE THRESHOLD OF RUNWAY 13 ON APPROACH CENTERLINE. THE AIRCRAFT WAS DESTROYED BY IMPACT. THE CAPTAIN, FIRST OFFICER, AND THREE OF THE FOUR PASSENGERS SUSTAINED SERIOUS INJURIES. THERE WAS NO POST-CRASH FIRE.
Recommendation: FLIGHTCREW TECHNIQUES BE DEVELOPED FOR USE DURING THE EXECUTION OF NONPRECISION INSTRUMENT APPROACHES THAT WILL REQUIRE CONTINUED ALTITUDE REFERENCE CALLOUTS BY THE NON-FLYING PILOT DURING THE TIME THE AIRCRAFT IS MAINTAINING THE MINIMUM DESCENT ALTITUDE. THESE CALLOUTS SHOULD BE MADE AT REASONABLE TIME INTERVALS UNTIL THE AIRCRAFT CROSSES THE RUNWAY THRESHOLD, OR UNTIL A MISSED-APPROACH PROCEDURE IS COMMENCED.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: La Crosse, WI, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: 79653
Accident Reports: Mississippi Valley Airways, Inc., DeHavilland DHC-6, N956SM
Report #: AAR-71-10
Accident Date: 11/9/1970
Issue Date: 5/5/1971
Date Closed: 7/21/1971
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: FAA
To: NTSB
Date: 7/9/1971
Response: THE FAA CONCURRED WITH THE RECOMMENDATION AND STATED THEIR PROGRAM WILL GO BEYOND THAT RECOMMENDED BY THE BOARD. THEY BELIEVE THE ALTITUDE CALLOUTS SHOULD BE MADE DURING PRECISION AS WELL AS NONPRECISION APPROACHES AND THAT SUCH CALLOUTS SHOULD BEGIN PRIOR TO REACHING THE MINIMUM DESCENT ALTITUDE. PROCEDURES WILL BE INSTITUTED WHEREBY ALTITUDE CALLOUTS WILL BE MADE BY THE NONFLYING PILOT AND WILL BE INCLUDED IN TRAINING PROGRAMS AND OPERATOR MANUALS.