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ASN Aircraft accident Embraer EMB-120RT Brasilia N270AS Brunswick-Glynco Jetport, GA (BQK)ASN logo Home Aviation safety Database Investigation News Photos Statistics        Contact us About Home » Database » 1991 Last updated: 10 December 2019
Status: Final
Date: Friday 5 April 1991
Time: 14:51
Type: Silhouette image of generic E120 model; specific model in this crash may look slightly different
Embraer EMB-120RT Brasilia
Operated by: Atlantic Southeast Airlines - ASA
On behalf of: Delta Connection
Registration: N270AS
C/n / msn: 120218
First flight: 1990
Total airframe hrs: 816
Cycles: 845
Engines: 2 Pratt & Whitney Canada PW118
Crew: Fatalities: 3 / Occupants: 3
Passengers: Fatalities: 20 / Occupants: 20
Total: Fatalities: 23 / Occupants: 23
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location: 3 km (1.9 mls) W of Brunswick-Glynco Jetport, GA (BQK) (   United States of America )
Phase: Approach (APR)
Nature: Domestic Scheduled Passenger
Departure airport: Atlanta-William B. Hartsfield International Airport, GA (ATL/KATL) , United States of America
Destination airport: Brunswick-Glynco Jetport, GA (BQK/KBQK) , United States of America
Flightnumber: 2311
Narrative:Flight 2311 was scheduled initially for airplane N228AS to depart at 13:24 EST. Because of mechanical problems an airplane change was made to N270AS. The flight departed Atlanta at 13:47 and arrived in the Brunswick area about 14:44. At 14:48 the flight was cleared for a visual approach to runway 07. The Embraer had just turned from base leg to final approach when the aircraft was seen to pitch up about 5deg and roll to the left until the wings were vertical. The airplane then nosed down into the ground, 9975 feet short of the runway.Probable Cause:PROBABLE CAUSE: "The loss of control in flight as a result of a malfunction of the left engine propeller control unit which allowed the propeller blade angles to go below the flight idle position. Contributing to the accident was the deficient design of the propeller control unit by Hamilton Standard and the approval of the design by the Federal Aviation Administration. The design did not correctly evaluate the failure mode that occurred during this flight, which resulted in an uncommanded and uncorrectable movement of the blades of the airplane's left propeller below the flight idle position."Accident investigation:
cover
Investigating agency:  NTSB
Status: Investigation completed
Duration:  1 year
Accident number: NTSB/AAR-92-03
Download report: Final report
Classification: Loss of control Sources: » Aviation Week & Space Technology 15.04.1991 (32)» NTSB Safety Recommendations A-92-25 through 30» NTSB/AAR-92/03Follow-up / safety actionsNTSB issued 6 Safety Recommendations
Issued: 14-MAY-1992 To: FAA A-92-25
CONDUCT A CERTIFICATION REVIEW OF THE HAMILTON STANDARD MODEL 14RF PROPELLER SYSTEM AND REQUIRE APPROPRIATE MODIFICATION TO ENSURE THAT THE PROPELLER SYSTEM COMPLIES WITH THE PROVISIONS OF 14 CFR SECTION 35.21. THE CERTIFICATION REVIEW SHOULD INCLUDE SUBJECTING THE SYSTEM TO THE VIBRATION SPECTRUM THAT WOULD BE ENCOUNTERED IN FLIGHT ON THOSE AIRCRAFT FOR WHICH IT IS CERTIFICATED. (Closed - Acceptable Action)
Issued: 14-MAY-1992 To: FAA A-92-26
EXAMINE THE CERTIFICATION BASIS OF OTHER MODEL PROPELLER SYSTEMS THAT HAVE SAME DESIGN CHARACTERISTICS AS THE HAMILTON STANDARD PROPELLER MODEL 14RF AND ENSURE THAT THE FAIL-SAFE FEATURES OF THOSE PROPELLER SYSTEMS WILL FUNCTION PROPERLY IN THE EVENT OF UNFORESEEN WEAR OF COMPONENTS IN THE PROPELLER SYSTEM. (Closed - Acceptable Action)
Issued: 14-MAY-1992 To: FAA A-92-27
ESTABLISH A PERIODIC INSPECTION TIME REQUIREMENT FOR THE TRANSFER TUBE SPLINES, SERVO BALLSCREW AND BALLSCREW QUILL ON HAMILTON STANDARD MODEL 14RF PROPELLERS AND OTHER PROPELLER SYSTEMS OF SIMILAR DESIGN. (Closed - Acceptable Action)
Issued: 14-MAY-1992 To: FAA A-92-28
ISSUE AN AIR CARRIER OPERATIONS BULLETIN (ACOB) DIRECTING PRINCIPAL OPERATIONS INSPECTORS TO CLARIFY WITH THEIR OPERATORS THAT THE INTENT OF 14 CFR SECTION 135-265 IS NOT TO ROUTINELY SCHEDULE REDUCED REST, BUT TO ALLOW FOR UNEXPECTED OPERATIONAL DELAYS, AND TO REQUIRE COMPLIANCE WITH THE INTENT OF THE REGULATION. (Closed - Unacceptable Action)
Issued: 14-MAY-1992 To: ATLANTIC SOUTHEAST AIRLINES A-92-29
DISCONTINUE THE SCHEDULING OF REDUCED REST PERIODS IN FLIGHT OPERATIONS; AND IN THE INTEREST OF FLIGHT SAFETY, UTILIZE REDUCED REST PERIODS FOR OPERATIONAL CONTINGENCIES CONSISTENT WITH THE INTENT OF 14 CFR 135.265. (Closed - Unacceptable Action)
Issued: 14-MAY-1992 To: Regional Airline Association A-92-30
ADVISE YOUR MEMBERS THAT THE INTENT OF THE REDUCED REST PROVISIONS OF 14 CFR 135.265 IS NOT TO ROUTINELY SCHEDULE REDUCED REST, BUT CONSISTENT WITH FLIGHT SAFETY, TO ALLOW FOR UNEXPECTED OPERATIONAL DELAYS, AND URGE THEM TO COMPLY WITH THE INTENT OF THE REGULATION. (Closed - Acceptable Action)
Show all... Photos Add your photo of this accident or aircraft Map This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path. Distance from Atlanta-William B. Hartsfield International Airport, GA to Brunswick-Glynco Jetport, GA as the crow flies is 381 km (238 miles).Accident location: Exact; as reported in the official accident report.This information is not presented as the Flight Safety Foundation or the Aviation Safety Network�s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time. languages: languages Share Embraer EMB-120 357 built 4th loss 4th fatal accident The worst accident (at the time)3rd worst accident (currently) » safety profile Home Disclaimer Copyright Privacy       Unless otherwise stated: copyright © 1996-2019 Aviation Safety Network (ASN)     
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