B737-700 captain reported receiving a momentary forward cargo fire warning on taxi-in that was later...

Narrative:

While taxiing into the gate; the forward cargo fire light and fire bell went off in the cockpit. I instructed first officer to read the procedure for a forward cargo fire light. I elected to continue taxiing to the gate due to its close proximity to the aircraft. Before the first officer could read the checklist; the light and horn extinguished in the cockpit (light and horn were on for approximately 10 seconds.) I stopped the aircraft and shut down the engines. I did not see the ramp workers indicate any fire indications and the flight attendants did not see any abnormal indications. I elected to not complete the forward cargo fire light checklist. I wrote up the discrepancy and maintenance was called.upon further review; a motorized wheelchair was still connected to its battery and the wheel was moving and rubbing against another object. There were small shards of wheel on the deck of the forward cargo area and a slight smell of burnt rubber. It was determined that the odor of burnt rubber set off the forward cargo fire detection light.

Original NASA ASRS Text

Title: B737-700 Captain reported receiving a momentary forward cargo fire warning on taxi-in that was later traced to a motorized wheelchair that still had the battery connected.

Narrative: While taxiing into the gate; the forward cargo fire light and fire bell went off in the cockpit. I instructed First Officer to read the procedure for a Forward Cargo Fire light. I elected to continue taxiing to the gate due to its close proximity to the aircraft. Before the First Officer could read the checklist; the light and horn extinguished in the cockpit (light and horn were on for approximately 10 seconds.) I stopped the aircraft and shut down the engines. I did not see the Ramp Workers indicate any fire indications and the Flight Attendants did not see any abnormal indications. I elected to not complete the Forward Cargo Fire light checklist. I wrote up the discrepancy and Maintenance was called.Upon further review; a motorized wheelchair was still connected to its battery and the wheel was moving and rubbing against another object. There were small shards of wheel on the deck of the forward cargo area and a slight smell of burnt rubber. It was determined that the odor of burnt rubber set off the Forward Cargo Fire detection light.

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	1238161
Time
Date	201502
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 129 Flight Crew Type 8217
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

B737-700 captain reported receiving a momentary forward cargo fire warning on taxi-in that was later traced to a motorized wheelchair that still had the battery connected.