GA flight instructor reported a significant fuel leak after takeoff.

Attributes
ACN	1497725
Time
Date	201711
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	Climb
Component
Aircraft Component	Fuel Tank Cap
Person 1
Function	Instructor
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Fuel Issue

Narrative:

After taking off we were asked to contact departure; and as we were climbing to assigned altitude instructor started smelling fuel and looked out the window. The left fuel tank had significant fuel leak through the fuel cap (the fuel cap was tightly secured in place) and instructor notified ATC of the incident and requested visual approach back to [departure airport].

Original NASA ASRS Text

Title: GA flight instructor reported a significant fuel leak after takeoff.

Narrative: After taking off we were asked to contact departure; and as we were climbing to assigned altitude Instructor started smelling fuel and looked out the window. The left fuel tank had significant fuel leak through the fuel cap (the fuel cap was tightly secured in place) and instructor notified ATC of the incident and requested visual approach back to [departure airport].

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.