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Preliminary report: Boeing 737-400 shimmy on landing, Bogotá, Colombia
15 April 2017

Preliminary report: Boeing 737-400 shimmy on landing, Bogotá, Colombia

Report: An-2 runway excursion accident on landing Polyarnyj, Russia

Report: DHC-8-402Q APU exhaust duct liner failure, resulting in smoke, Belfast, U.K.

Report: Airbus A320 loss of automatic stabiliser trim, in-flight over France

Report: Jetstream 32 runway excursion incident on takeoff Auckland, New Zealand

Preliminary report: Saab 340B in-flight propeller loss, Sydney, Australia

The ATSB has released a preliminary report into the in-flight propeller detachment involving a Regional Express SAAB 340 aircraft near Sydney Airport on 17 March 2017.

The ATSB’s inspection of the aircraft identified that the propeller shaft fractured, leading to the separation of the propeller.

An inspection of the propeller revealed a fatigue fracture that began in the propeller mounting flange (the part that attaches the propeller to the gearbox) and continued into the propeller shaft. The inspection also found corrosion near the initiation of the fracture.

The ATSB stated that this was the first known critical failure of this type, initiating within the propeller hub flange of the GE Aviation CT7-9B engine.

The ATSB’s ongoing investigation will focus on maintenance procedures associated with the propeller gear box shaft and examine factors that may have contributed to the fatigue fracture at the propeller mounting flange.

Meanwhile the following Safety Recommendation was issued:
“The ATSB advises that those responsible for the operation and maintenance of SAAB 340 and EADS CASA CN-235 aircraft fitted with the GE Aviation CT7 engine type variants 5A2, 7A1, 9B, 9C, and 9C3 should note the facts presented in the preliminary report with a view to addressing any risks to their own operation.”

More information:


Report: NTSB releases dockets on British Airways Boeing 777 engine fire accident, Las Vegas

Report: Poor ATC coordination factor in Boeing 737, ATR-42 runway collision, Jakarta

Report: Jet Airways Boeing 737-900 depressurization incident

Report: Lion Air Boeing 737-900 runway excursion incident after long and fast landing