B777-200
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 125; Flight Crew Total 18000; Flight Crew Type 4000
Physiological - Other; Situational Awareness; Time Pressure; Workload
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural MEL / CDL; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Landed in Emergency Condition; Flight Crew Took Evasive Action; Flight Crew Requested ATC Assistance / Clarification; General Physical Injury / Incapacitation; General Maintenance Action; General Declared Emergency
Aircraft; Human Factors; Procedure; MEL
Had diverted enroute on the previous leg due to electrical odor on the aircraft. Had a STATUS MSG for CARGO VENT FAN. Maintenance determined it was an overheated cargo fan causing our electrical odor. Maintenance deferred fan unit and we continued flight to our filed destination. On approach Purser called cockpit to report electrical odor again in first class cabin area. We declared [an] emergency and made normal landing. Proceeded to gate after fire rescue again checked the aircraft and odor dissipated and offloaded passengers. Three flight attendants complain of headache; nausea; and scratchy throat. All three were treated by paramedics.
[Narrative 2 has no additional information]
After previously diverting en route for an odor and with the Cargo Fan MELed; the flight continued to the filed destination where on approach the odor returned. So an emergency was declared and the crew donned oxygen masks for a short approach. Several flight attendants reported being ill.