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Safety Recommendation Details

Safety Recommendation A-72-023
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: REVIEW THE DESIGN AND CERTIFICATION CRITERIA OF PART 23 OF THE FEDERAL AVIATION REGULATIONS APPLICABLE TO THE FIRE PROTECTION OF POWERPLANT INSTALLATIONS FOR ADEQUACY AND EFFECT APPROPRIATE REGULATORY CHANGES IF DEEMED APPROPRIATE.
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: FAA
To: NTSB
Date: 3/31/1978
Response: Amendment 23-18 added two new rules that are directly relatedto the recommendation. Federal aviation regulations (far) airplanes. Paragraph 23.1203 of this far adds a requirement for fire detectors.

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

From: FAA
To: NTSB
Date: 3/8/1972
Response: AS A RESULT OF FAA'S STUDY OF THE RULES PERTAINING TO ENGINE FIRE PROTECTION FOR LIGHT TWIN-ENGINE AIRPLANES SUCH AS THE BEECH 65, REGULATORY PROPOSALS ARE BEING DEVELOPED TO UPGRADE SAFETY STANDARDS.11/29/73 THE FAA HAS ACCOMPLISHED A GREAT DEAL IN REGARD TO ENGINE FIRE PROTECTION. IN ADDITION THEY ISSUED AD-73-234 BEECH WHICH REQUIRES THE INSTALLATION OF FIRE SEAL KITS IN MANY OF THE BEECH MODELS. HOWEVER, THE REQUIREMENT FOR FIRE DETECTION SYSTEMS AND AIRCRAFT DESIGN CHANGES FOR ALL PART 23 AIRCRAFT IS PENDING AND WILL BE RECONSIDERED IN ANOTHER RECOMMENDATION.