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Safety Recommendation Details

Safety Recommendation A-72-024
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: ADVISE ALL OWNERS AND OPERATORS OF BEECH MODEL 65 AIRPLANES OF THE OCCURRENCE OF TWO ACCIDENTS WHEREIN AN ENGINE FIRE RESULTED IN SEPARATION OF THE AIRPLANES' WINGS WITHIN 2 TO 3 MINUTES. OPERATORS SHOULD FURTHER BE ADVISED TO TAKE ALL POSSIBLE MEASURES TO INSURE INTEGRITY AND AIRWORTHINESS OF THE POWERPLANT INSTALLATION TO REDUCE THE PROBABILITY OF AN IN-FLIGHT FIRE.
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: 1/1/1975
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 3/1/1975
Response: Closed--acceptable action.

From: FAA
To: NTSB
Date: 7/7/1972
Response: A LETTER WAS MAILED TO ALL OWNERS AND OPERATORS OF THE BEECH AND OTHER SIMILAR LIGHT TWIN-ENGINED AIRPLANES TO INFORM THEM OF THE OCCURRENCE OF TWO SERIOUS ENGINE FIRES AND TO ENCOURAGE OBSERVANCE OF GOOD MAINTENANCE AND OPERATING PROCEDURES TO PREVENT OR SAFELY CONTROL ENGINE FIRES.