Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation A-95-083
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: REVIEW THE CURRENT OVERHAUL & INSPECTION REQUIREMENTS FOR ALL HAMILTON STANDARD 14 SERIES PROPELLER BLADES FOR WHICH THE TAPER BORE HOLE HAS BEEN SHOT PEENED TO DETERMINE WHETHER ADDITIONAL INSPECTIONS OR MAINTENANCE SHOULD BE REQUIRED.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable 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: 11/15/1996
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 11/15/1996
Response: BECAUSE THE FAA'S ACTIONS ARE RESPONSIVE TO THE INTENT OF THE RECOMMENDATION, THE BOARD CLASSIFIES A-95-83 "CLOSED--ACCEPTABLE ACTION.

From: FAA
To: NTSB
Date: 7/24/1996
Response: THE FAA STATES THAT THEY HAVE REVIEWED THE OVERHAUL & INSPECTION REQUIREMENTS FOR ALL HAMILTON STANDARD 14RF, 14SF & 6/5500/F BLADE DESIGNS FOR WHICH THE TAPER BORE HOLE HAS BEEN SHOT PEENEED TO DETERMINE WHETHER ADDITIONAL INSPECTIONS OR MAINTENANCE SHOULD BE REQUIRED. THE RESULTS OF THAT REVIEW SHOWED THAT ADDITIONAL ACTION SHOULD BE TAKEN. ON 4/24/96, THE FAA ISSUED AD 96-08-02 TO REQUIRE REPETITIVE ULTRASONIC INSPECTION OF THE BLADES UNTIL THEY ARE REPAIRED & RESTORED TO THE CERTIFICATED STRENGTH. THE BLADE REPAIR REMOVES THE DAMAGE THAT LOWERED THE FATIGUE STRENGTH OF THE BLADE. THE REPAIR OF EMB-120 BLADES WAS REQUIRED TO BE ACCOMPLISHED BY AUGUST 1996, & ALL OTHER BLADES WILL BE REPAIRED BY FEBRUARY 1997.

From: NTSB
To: FAA
Date: 1/16/1996
Response: THE BOARD NOTES THAT THE FAA IS REVIEWING CURRENT MANUALS & INSPECTION REQUIREMENTS WITH HAMILTON STANDARDS TO DETERMINE NEW INSPECTION REQUIREMENTS FOR SHOT PEENED PROPELLER BLADES THAT MAY BE AFFECTED BY CORROSION IN THE TAPER BORE. PENDING COMPLETION OF THE REVIEW, THE BOARD CLASSIFIES A-95-83 "OPEN--ACCEPTABLE RESPONSE."

From: FAA
To: NTSB
Date: 9/6/1995
Response: THE FAA AGREES WITH THIS RECOMMENDATION & IS REVIEWING THE CURRENT MANUALS & INSPECTION REQUIREMENTS WITH HAMILTON STANDARD TO DETERMINE WHAT ADDITIONAL INSPECTIONS OR MAINTENANCE MAY BE REQUIRED FOR ALL HAMILTON STANDARDS 14RF, 14SF, & 6/5500/F SERIES PROPELLER BLADES WITH SHOT PEENED TAPER BORES.