Narrative:

While serving as first officer; the following event occurred.after takeoff while performing the after takeoff flow checklist; crew noticed illuminated bagg ext button at approximately 4;000 ft. Crew [advised ATC]; and asked to return to ZZZ while also requesting assistance from crash fire rescue. Crew performed the [recommended procedure] in the QRH; returned and landed safely at ZZZ on runway xxr. Crash fire rescue crews inspected the baggage compartment on the taxiway and then escorted the airplane back to the gate for further inspection.there were no live animals onboard and no personnel injury or aircraft damage noted. Unsure of cause of smoke alarm; overweight landing reported to maintenance with a touchdown descent rate of 250 fpm.

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Original NASA ASRS Text

Title: ERJ-140 flight crew reported cargo compartment fire warning after takeoff; resulting in a return to land.

Narrative: While serving as First Officer; the following event occurred.After takeoff while performing the After Takeoff Flow Checklist; crew noticed illuminated BAGG EXT button at approximately 4;000 ft. Crew [advised ATC]; and asked to return to ZZZ while also requesting assistance from Crash Fire Rescue. Crew performed the [recommended procedure] in the QRH; returned and landed safely at ZZZ on Runway XXR. Crash Fire Rescue crews inspected the baggage compartment on the taxiway and then escorted the airplane back to the gate for further inspection.There were no live animals onboard and no personnel injury or aircraft damage noted. Unsure of cause of smoke alarm; overweight landing reported to Maintenance with a touchdown descent rate of 250 fpm.

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.