On 7 June 2016, a GE90-115B engined Boeing 777-300 made a high speed rejected takeoff on 3200 metre-long runway 14 at Dhaka after right engine failure was annunciated at 149KCAS - just below V1. Neither crew nor ATC requested a runway inspection and 12 further aircraft movements occurred before it was closed for inspection and recovery of 14 kg of debris. The Investigation found that engine failure had followed Super Absorbent Polymer (SAP) contamination of some of the fuel nozzle valves which caused them to malfunction leading to Low Pressure Turbine (LPT) mechanical damage. The contaminant origin was not identified.
Description
On 7 June 2016, a GE90-115B-engined Boeing 777-300 (S2-AFP) being operated by Biman Bangladesh Airlines on a scheduled international passenger flight from Dhaka to Dammam as BG-049 made a high speed rejected takeoff in normal daylight when an ENGINE FAIL R warning was annunciated. The extent of external engine damage to the rear part of the low pressure turbine section was not appreciated until after the aircraft had returned to the terminal, and the runway was not closed for inspection and debris clearance until 12 more aircraft had used it.
Investigation
An Investigation was carried out by the Bangladesh Aircraft Accident Investigation Group (AAIG). Relevant recorded flight data was available from the FDR and the CVR. It was noted that the 60 year-old Captain had a total of 23,512 hours flying experience of which 3,637 hours were on type and the 38 year-old First Officer had a total of 6,951 hours flying experience of which 1,869 hours were on type.
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