As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 1820 APPROACHING LEVEL OFF AT FL340, L AND R UTILITY BUS, L AND R RECIRC FANS AND GASPER FAN TRIPPED OFF. WIFF OF ELECTRIC FUMES IN CREW REST AND LAST 3 ROWS DISSIPATED AFTER FEW MINUTES. CORRECTIVE ACTION: R/R LT & RT RECIRC AIR FILTERS PER B767 AMM 21-25. R/R #1 BPCU PER B767 AMM 24-41 (8050750)