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Safety Recommendation Details

Safety Recommendation A-95-081
Details
Synopsis: ABOUT 12:50 P.M. EASTERN DAYLIGHT TIME, ON 8/21/95, AN ATLANTIC SOUTHEAST AIRLINES (ASA), EMBRAER EMB-120, N255AS, OPERATING AS DELTA AIRLINES FLIGHT 7529, MADE AN OFF AIRPORT FORCED LANDING NEAR CARROLLTON, GEORGIA. THE PILOTS REPORTED AN ENGINE FAILURE AS THE FLIGHT WAS CLIMBING THROUGH ABOUT 18,000 FEET. FLIGHT 7529 WAS EN ROUTE FROM ATLANTA, GEORGIA, TO GULFPORT, MISSISSIPPI, AS A SCHEDULED COMMUTER PASSENGER FLIGHT OPERATING UNDER THE PROVISIONS OF TITLE 14 CODE OF FEDERAL REGULATIONS (CFR) PART 135. THERE WERE 26 PASSENGERS, TWO PILOTS & ONE FLIGHT ATTENDANT ABOARD THE FLIGHT. ON 3/20/94, A NORDESTA AIRLINES EMBRAER EMB-120 LOST A MAJOR PORTION OF ONE BLADE OF A HAMILTON STANDARD MODEL 14RF COMPOSITE BLADE WHILE AT CRUISE AT 22,000 FEET OVER BRAZIL. ON 8/3/95, THE MAJOR PORTION OF ANOTHER MODEL 14RF PROPELLER BLADE SEPARATED IN FLIGHT FROM THE RIGHT ENGINE OF A LUXAIR EMB-230, BELGIUM REGISTRATION LX-LGK.
Recommendation: THE NTSB RECOMMENDS THAT THE FAA: IMMEDIATELY IMPLEMENT THE ULTRASONIC INSPECTION PROGRAM ON HAMILTON STANDARD PROPELLER BLADES CITED IN PARAGRAPH (A)(2) OF AIRWORTHINESS DIRECTIVE (AD) 95-05-03, IRRESPECTIVE OF PRIOR COMPLIANCE WITH PARAGRAPH (D) OF THE AD. REQUIRE THE INITIAL INSPECTION BEFORE FURTHER FLIGHT ON ANY PROPELLER BLADES THAT HAVE ACCUMULATED 1,250 CYCLES SINCE THE LAST ULTRASONIC INSPECTION OR SINCE THE VISUAL AND BORESCOPE INSPECTION REQUIRED BY PARAGRAPH (D) OF THE AD. (URGENT)
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Alternate Action
Mode: Aviation
Location: CARROLLTON, GA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA95MA054
Accident Reports: In-flight Loss of Propeller Blade Forced Landing, and Collision with Terrain Atlantic Southeast Airlines, Inc., Flight 529 Embraer EMB-120RT, N256AS
Report #: AAR-96-06
Accident Date: 8/21/1995
Issue Date: 8/25/1995
Date Closed: 1/16/1996
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Alternate Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 1/16/1996
Response: THE BOARD NOTES THAT THE FAA HAS ISSUED APPROPRIATE ADS TO ENSURE THAT REWORKED PROPELLER BLADES THAT HAVE NOT BEEN SHOT PEENED HAVE BEEN REMOVED FROM SERVICE ON EMB-120 AIRPLANES WITHIN 10 FLIGHT CYCLES. THE ADS ALSO ENSURE THAT REWORKED PROPELLER BLADES THAT HAVE NOT BEEN SHOT PEENED ON AIRPLANES OTHER THAN EMB-120 AIRPLANES HAVE BEEN INSPECTED WITHIN 10 FLIGHT CYCLES. ALL OF THESE BLADES ARE TO BE PLACE ON A RECURRING ULTRASONIC INSPECTION CYCLE. THEREFORE, THE BOARD CLASSIFIES A-95-81 "CLOSED--ACCEPTABLE ALTERNATE ACTION."

From: FAA
To: NTSB
Date: 9/6/1995
Response: THE FAA AGREES WITH THIS RECOMMENDATION. ON 8/25/95, THE FAA ISSUED A TELEGRAPHIC AIRWORTHINESS DIRECTIVE T95-18-51 FOR IMMEDIATE TRANSMITTAL TO ALL OWNERS & OPERATORS OF HAMILTON STANDARD MODELS 14 RF-9, -19, -12, & 14SF-5, -7 -11, 15, -17, -19, & -23 AIRCRAFT, & TO HAMILTON STANDARD/BRITISH AEROSPACE 6/5500/F PROPELLERS INSTALLED ON EMBRAER EMB-120 & AEROSPATIALE ATR42-100 , -300, -320, & ATR72 AIRCRAFT, DEHAVILLAND DHC-8-100 & DCH-8-300 AIRCRAFT, CONSTRUCCIONES AERONAUTICAS SA CN-235 & CN-235-1OO AIRCRAFT, CANADAIR CL-215T & CL-415 AIRCRAFT, BRITISH AEROSPACE ATP AIRCRAFT.