MD11 flight crew reported smoke in the flight deck. They donned oxygen masks and ran the appropriate...

Narrative:

Just before descent at FL300; on the arrival; I noticed an acrid smell and then saw smoke pouring into cockpit from what seemed like 'everywhere'. First officer (first officer) and I simultaneously reached for and donned our O2 masks. I was pilot monitoring (pm) and took aircraft control. I coordinated with ATC for vectors direct [destination] and a descent. The first officer established cockpit communication and we troubleshot the problem. The arrival and approach had been briefed. We had no warnings; or cautions; just smoke. We turned the #2 pack off and turned the air temperature down. The smoke stopped billowing out and began to dissipate. We checked on the [passengers] and they had no indications of fire; or smoke. We briefed them what was going on and what our plan was. After 5-10 minutes no smoke was visible; or smelled. We stowed our O2 masks and continued without them. The HUD was MEL-ed and proved distracting because of bad information on the previous flight. We transferred control back to the first officer during the descent. He made an uneventful approach and landing; taxied clear to taxiway south via S4. Emergency vehicles met and inspected us; then led us to parking. Aircraft maintenance was debriefed at the jet as was the duty officer telephonically. The maintenance write up stated that 3 water separators were changed and the aircraft was returned to service. Change water separators; or inspect more frequently.

Original NASA ASRS Text

Title: MD11 flight crew reported smoke in the Flight Deck. They donned oxygen masks and ran the appropriate checklist. This resolved the problem and they continued to destination.

Narrative: Just before descent at FL300; on the Arrival; I noticed an acrid smell and then saw smoke pouring into cockpit from what seemed like 'everywhere'. First Officer (FO) and I simultaneously reached for and donned our O2 masks. I was Pilot monitoring (PM) and took aircraft control. I coordinated with ATC for vectors direct [destination] and a descent. The FO established cockpit communication and we troubleshot the problem. The arrival and approach had been briefed. We had no warnings; or cautions; just smoke. We turned the #2 Pack off and turned the air temperature down. The smoke stopped billowing out and began to dissipate. We checked on the [passengers] and they had no indications of fire; or smoke. We briefed them what was going on and what our plan was. After 5-10 minutes no smoke was visible; or smelled. We stowed our O2 masks and continued without them. The HUD was MEL-ed and proved distracting because of bad information on the previous flight. We transferred control back to the FO during the descent. He made an uneventful approach and landing; taxied clear to taxiway S via S4. Emergency vehicles met and inspected us; then led us to parking. Aircraft Maintenance was debriefed at the jet as was the duty officer telephonically. The maintenance write up stated that 3 water separators were changed and the aircraft was returned to service. Change water separators; or inspect more frequently.

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.

Attributes
ACN	1450875
Time
Date	201705
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

MD11 flight crew reported smoke in the flight deck. They donned oxygen masks and ran the appropriate checklist. This resolved the problem and they continued to destination.