An unusual rash of engine shutdowns since early December has temporarily stranded three of the normally reliable General Electric-powered Boeing 777-300ERs.
Although each incident involved a shutdown of the GE90-115B, GE’s investigation so far indicates the causes of each power loss appears to come from three different sources, says a company spokeswoman.
The incidents have forced two different Air
In the first incident, the Air France pilot crew noticed “excess vibrations” and powered down the engine, making an emergency landing in
On 25 January, a second Air
Finally, the Singapore Airlines flight was disrupted by an undisclosed problem with the engine’s accessories gearbox. At press time, GE was not certain if the pilot commanded the engine to power-down, or if the engine failed in flight. GE is continuing to investigate the incident to uncover the root cause of the gearbox issue.
Both the transfer gearbox and the accessories gearbox are produced by the same supplier,
Both components have been installed on older-model aircraft equipped with GE90-94B engines, achieving an 11-year in-service record with no prior incidents before 25 January.