Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 450; Flight Crew Total 25000; Flight Crew Type 2773
Training / Qualification
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Clearance
Human Factors
While I was sleeping during my break an altitude deviation occurred. The relief pilots were in Russian airspace. They were assigned a cruise altitude in Meters. They misread the feet to meters chart and set an incorrect altitude. As they descended a thousand feet below their actual cruise altitude assignment ATC intervened. They then climbed back to the correct altitude.
B787 Captain reported that a conversion error between meters and feet resulted in an altitude deviation.