Falcon 900 flight crew reported encountering smoke in the cockpit in cruise flight.

Attributes
ACN	1668209
Time
Date	201907
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Falcon 900
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

Noticed a burning smell inflight. Upon starting descent; grey/white smoke/fumes started illuminating from the lower center windscreen. [Priority handling was requested] with the ATC facility and diverted into ZZZ. Smoke continued for about 2 minutes then ceased. After about a 2-3 minute pause; the smoke returned for another 2 minutes. The smoke then ceased and a normal landing was performed.

Original NASA ASRS Text

Title: Falcon 900 flight crew reported encountering smoke in the cockpit in cruise flight.

Narrative: Noticed a burning smell inflight. Upon starting descent; grey/white smoke/fumes started illuminating from the lower center windscreen. [Priority handling was requested] with the ATC facility and diverted into ZZZ. Smoke continued for about 2 minutes then ceased. After about a 2-3 minute pause; the smoke returned for another 2 minutes. The smoke then ceased and a normal landing was performed.

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.