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Safety Recommendation Details

Safety Recommendation A-72-022
Details
Synopsis: THE NATIONAL TRANSPORTATION SAFETY BOARD IS CURRENTLY INVESTIGATING A FATAL ACCIDENT WHICH OCCURRED NEAR FAIRFIELD, IDAHO, ON FEBRUARY 20, 1972, INVOLVING A BEECH MODEL 65B-80 AIRPLANE. PRELIMINARY INVESTIGATION OF THE ACCIDENT HAS DISCLOSED THAT A SEPARATION OF THE AIRCRAFT'S LEFT OUTER WING PANEL OCCURRED IN FLIGHT AND THAT THE SEPARATION WAS ASSOCIATED WITH AN INTENSE FIRE IN THE LEFT ENGINE. THE FIRE HAD PROGRESSED FROM THE ENGINE NACELLE THROUGH THE WHEEL WELL AND SUBSEQUENTLY RESULTED IN SUFFICIENT HEAT IMPINGEMENT UPON THE WING SPARS TO WEAKEN THEM TO THE POINT OF FAILURE.
Recommendation: IF IT IS FOUND THAT THESE CRITERIA ARE INADEQUATE, INITIATE CORRECTIVE ACTION TO ENSURE ADEQUATE FIRE PROTECTION OF THE POWERPLANT INSTALLATION AND THE ADJACENT AIRPLANE STRUCTURE.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Fairfield, ID, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: SEA72AS033
Accident Reports: Sun Valley Airlines, Inc., Beech 65B-80, N1027C
Report #: AAR-72-25
Accident Date: 2/20/1972
Issue Date: 2/25/1972
Date Closed: 7/7/1975
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 7/7/1975
Response: Closed-acceptable action.

From: FAA
To: NTSB
Date: 7/7/1972
Response: IN VIEW OF THE SERIOUS NATURE OF THE RECENT POWERPLANT FIRES, DEVELOPMENT OF MODIFICATIONS TO THE BEECH MODEL 65 SERIES AIRPLANES TO IMPROVE THE POWERPLANT FIRE INTEGRITY HAS BEEN INITIATED.