A319 flight crew reported a burning smell in the cabin that resulted in a diversion.

Attributes
ACN	1713006
Time
Date	201912
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Weight And Balance Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

During cruise flight; both pilots; the flight attendants and passengers smelled a sudden strong acrid odor. Both pilots donned oxygen masks. I advised ATC and requested immediate descent and clearance direct to ZZZ. I ran the emergency checklists while the first officer flew us to ZZZ. After running qa-5 checklist; the fumes decreased significantly. The first officer performed a smooth overweight landing at ZZZ. I taxied to the gate. There were no injuries or illnesses from the event.

Original NASA ASRS Text

Title: A319 flight crew reported a burning smell in the cabin that resulted in a diversion.

Narrative: During cruise flight; both pilots; the flight attendants and passengers smelled a sudden strong acrid odor. Both pilots donned oxygen masks. I advised ATC and requested immediate descent and clearance direct to ZZZ. I ran the emergency checklists while the First Officer flew us to ZZZ. After running QA-5 checklist; the fumes decreased significantly. The First Officer performed a smooth overweight landing at ZZZ. I taxied to the gate. There were no injuries or illnesses from the 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.