A319 first officer reported that during initial approach they got a steady ECAM; hydraulic green low...

Narrative:

Enroute we had a master caution flash at us. It was so quick that we were not able to see the ECAM. The second one went off about a minute later and the captain saw that one flash and it said hydraulic. We saw that the reservoir was low in the green system but we had no ECAM. We decided not to run the QRH because it had us shut pumps off and we still had good pressure and no ECAM. However; we did prep a contingency plan and read the procedure entirely so we were ready in case we did get a failure; which we did get. At flaps 2; 2;000 feet msl; being vectored on to the ILS at ZZZ we got a steady ECAM. Hydraulic green low reservoir and eventually low pressure. As briefed we transferred controls to the captain and immediately [advised ATC] and announced our intentions to divert to ZZZ1. We ran ECAM and QRH procedures including a gravity gear extension and landed without any problems. We were able to control the aircraft enough to get off the runway per fire marshall's request. We stopped on the taxiway and deplaned without any issues. These things aren't 100% fail proof. I could have done a better job by communicating to the captain that I needed us to extend downwind because I needed about 5 more minutes for checklists and prepping. We were able to complete everything but it was unnecessarily rushed. All in all; ATC; fire marshall; and the crew did a great job.

Original NASA ASRS Text

Title: A319 First Officer reported that during initial approach they got a steady ECAM; HYD green low reservoir warning and eventually low pressure warning causing them to divert.

Narrative: Enroute we had a master caution flash at us. It was so quick that we were not able to see the ECAM. The second one went off about a minute later and the Captain saw that one flash and it said Hydraulic. We saw that the reservoir was low in the green system but we had no ECAM. We decided not to run the QRH because it had us shut pumps off and we still had good pressure and no ECAM. However; we did prep a contingency plan and read the procedure entirely so we were ready in case we did get a failure; which we did get. At Flaps 2; 2;000 feet msl; being vectored on to the ILS at ZZZ we got a steady ECAM. HYD green low reservoir and eventually low pressure. As briefed we transferred controls to the Captain and immediately [advised ATC] and announced our intentions to divert to ZZZ1. We ran ECAM and QRH procedures including a gravity gear extension and landed without any problems. We were able to control the aircraft enough to get off the runway per Fire Marshall's request. We stopped on the taxiway and deplaned without any issues. These things aren't 100% fail proof. I could have done a better job by communicating to the Captain that I needed us to extend downwind because I needed about 5 more minutes for checklists and prepping. We were able to complete everything but it was unnecessarily rushed. All in all; ATC; Fire Marshall; and the crew did a great job.

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	1535099
Time
Date	201804
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Hydraulic Fluid
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

A319 first officer reported that during initial approach they got a steady ECAM; hydraulic green low reservoir warning and eventually low pressure warning causing them to divert.