AN ACR DC10-40 HAD TO RETURN LAND WITH AN APPARENT INFLT ENG FIRE. THERE WAS NO FIRE.

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APPROX 5 KTS BELOW V1 ON TKOF ROLL; THE #1 FIRE WARNING LIGHT AND BELL INDICATED A FIRE IN THE #1 ENG. TKOF WAS CONTINUED; AND AT APPROX 800 FT AGL; THE #1 'THRUST REVERSER UNLOCKED' LIGHT ALSO ILLUMINATED. AN EMER WAS DECLARED AND FUEL DUMPING WAS STARTED AT APPROX 1200 FT AGL. APPROX 17000 LBS OF FUEL WAS DUMPED AND ACFT RETURNED TO MSP. ALL EMER CHKLISTS WERE COMPLETED; FIRE EXTINGUISHER AGENT DISCHARGED; AND THE FIRE LIGHT WENT OUT. ACFT RETURNED WITHOUT FURTHER INCIDENT; AND AFTER INSPECTION BY THE MSP CFR CREW; PAX WERE DEPLANED AT THE GATE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR FLIES THE DC10-40 WITH PRATT AND WHITNEY ENGS. THERE WAS NO FIRE. THE WARNING WAS CAUSED BY THE 15TH STAGE BLEED FAILING SENDING VERY HOT; HIGH PRESSURE AIR INSIDE THE COWLING. BLEED AIR OPERATES THE REVERSERS. WHEN PRESSURE WAS RELEASED; THE REVERSERS WERE ABLE TO RELAX. THEY DID NOT OPEN. THERE WAS NO ACFT DAMAGE EXCEPT TO THE DUCTING AND ITS INSULATION. THE FLC IMMEDIATELY WENT TO A REPLACEMENT ACFT; SO THE RPTR DID NOT HAVE MUCH TIME TO INVESTIGATE THE ACFT. HE HAS NOT HEARD FROM THE FAA ON THIS INCIDENT.