On 26 November 2008, Delta Air Lines Flight 18 from Shanghai to Atlanta experienced an "uncommanded rollback" of one engine while in cruise at 39,000 feet.
The crew followed manual recovery procedures and the flight continued without incident.
The US NTSB assigned one of the investigators who worked on the BA Flight 38 investigation to this incident, and looked specifically for any similarity between the two incidents.
The NTSB Safety Recommendation report concluded that ice clogging the FOHE was the likely cause.
 The evidence was stronger in this case since data from the flight data recorder allowed the investigators to locate where the fuel flow was restricted.

In early 2009 Boeing sent an update to aircraft operators, linking the British Airways and Delta Air Lines "uncommanded rollback" incidents, and identifying the problem as specific to the Rolls-Royce engine fuel-oil heat exchangers.
Originally, it was thought that other aircraft were not affected by the problem.
However, in May 2009, another similar incident happened with an Airbus A330 powered by a Trent series 700 engine.

The enquiries led Boeing to reduce the recommended time that the fuel on 777 aircraft equipped with Rolls-Royce Trent 800-series engines be allowed to remain at temperatures below −10 °C (14 °F) from three to two hours.

On 11 March 2009, the National Transportation Safety Board issued urgent safety recommendation SB-09-11 calling for the redesign of the fuel-oil heat exchangers used on Rolls-Royce Trent 800 Series engines.
A build-up of ice from water naturally occurring in the fuel had caused a restriction of the flow of fuel to the engines of G-YMMM.
Rolls-Royce had already started on redesigning the component, with an in-service date of March 2010 at the latest.
All affected engines were to be fitted with the redesigned component within six months of its certification.
In May 2010 the Airworthiness Directive was extended to cover the Trent 500 and 700 series engines as well.
On 26 November 2008, Delta Air Lines Flight 18 from Shanghai to Atlanta experienced an "uncommanded rollback" of one engine while in cruise at 39,000 feet. The crew followed manual recovery procedures and the flight continued without incident. The US NTSB assigned one of the investigators who worked on the BA Flight 38 investigation to this incident, and looked specifically for any similarity between the two incidents. The NTSB Safety Recommendation report concluded that ice clogging the FOHE was the likely cause.  The evidence was stronger in this case since data from the flight data recorder allowed the investigators to locate where the fuel flow was restricted.
In early 2009 Boeing sent an update to aircraft operators, linking the British Airways and Delta Air Lines "uncommanded rollback" incidents, and identifying the problem as specific to the Rolls-Royce engine fuel-oil heat exchangers. Originally, it was thought that other aircraft were not affected by the problem. However, in May 2009, another similar incident happened with an Airbus A330 powered by a Trent series 700 engine.
The enquiries led Boeing to reduce the recommended time that the fuel on 777 aircraft equipped with Rolls-Royce Trent 800-series engines be allowed to remain at temperatures below −10 °C (14 °F) from three to two hours.
On 11 March 2009, the National Transportation Safety Board issued urgent safety recommendation SB-09-11 calling for the redesign of the fuel-oil heat exchangers used on Rolls-Royce Trent 800 Series engines. A build-up of ice from water naturally occurring in the fuel had caused a restriction of the flow of fuel to the engines of G-YMMM. Rolls-Royce had already started on redesigning the component, with an in-service date of March 2010 at the latest. All affected engines were to be fitted with the redesigned component within six months of its certification. In May 2010 the Airworthiness Directive was extended to cover the Trent 500 and 700 series engines as well.
British Airways Flight 38