B777 captain reported temporary health symptoms from 'smoke event.'

Attributes
ACN	1694055
Time
Date	201910
Aircraft 1
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 122 Flight Crew Total 14554 Flight Crew Type 9436
Events
Anomaly	Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

Before the fire return all 3 of us were coughing up a lung. I have seen this before due to the fact the 777 has powerful recirculating fans and the dust and impurities can be blown back up through the radio rack below our feet. Once the event began I never thought about it again since there was no obvious external signs. The air felt and looked clear but we were all hacking away. After we landed I realized that we were more than likely breathing the particles from the ensuing smoke event.

Original NASA ASRS Text

Title: B777 Captain reported temporary health symptoms from 'smoke event.'

Narrative: Before the fire return all 3 of us were coughing up a lung. I have seen this before due to the fact the 777 has powerful recirculating fans and the dust and impurities can be blown back up through the radio rack below our feet. Once the event began I never thought about it again since there was no obvious external signs. The air felt and looked clear but we were all hacking away. After we landed I realized that we were more than likely breathing the particles from the ensuing smoke event.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.