B777 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 108; Flight Crew Total 13531; Flight Crew Type 224
Time Pressure; Other / Unknown; Distraction
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Aircraft Equipment Problem Dissipated; Flight Crew Overcame Equipment Problem; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Outside the marker [Runway] XXR Captain received call from purser about chemical type smell moving forward from aft cabin. Noticed it on extreme short final but took measures to alleviate; if possible; the stated smell and monitored for reduction or increase.  The landing in gusty conditions required focus there. On landing APU selected to start on final was on line and directed APU bleed air to packs and selected recirculate [fans] off immediately causing cessation of the smell and acknowledged alleviation in command.  Smell was barely noticeable but a tad acrid then removed on taxi in.  Recirculate [fans] back on blew it out completely. Never a need nor concern for use of cockpit oxygen. No persons affected nor did anyone use O2.  No injuries. Event terminated at gate with a write up and briefing of mechanics plus filling out of required maintenance 4 page review by Captain.
On approach in ZZZ the Captain received a call from the lead Flight Attendant about an acrid chemical smell moving forward from the aft cabin.  By that time we could smell it in the cockpit as well.  We turned off the recirculate fans to stop the spread of the smell; which helped; but then focused on the landing.  We started the APU on short final and turned off the engine bleeds after exiting the runway; using the APU to power the packs.  After turning off the engine bleeds the smell dissipated and we turned the recirculate fans back on. No oxygen was used or needed by the crew or passengers.  We parked safely at the gate and briefed me and made a maintenance write up.
B777 flight crew reported a fumes event on final approach during landing. After executing a safe landing flight crew took measures to alleviate the fumes followed by requesting maintenance.