Narrative:

On short final; we received a 'left engine fire' warning. All engine instrument indications were normal. I reduced power on the left engine and we elected to continue the approach and landing. The landing was normal and uneventful. After clearing the runway; we shut down the left engine. The fire warning extinguished shortly (less than 30 seconds) after the engine was shut down. The taxi to the ramp was normal and uneventful. After shutdown of the aircraft; the postflt inspection revealed hydraulic fluid leaking from the bottom of the left engine. There was also a charred spot on the lower; forward; right side of the left engine cowling. We did not declare an emergency; as the event happened on short final into an uncontrolled airport and our only communication was on the local CTAF. We decided that the landing was safer than a go around on short final with a possible engine fire at an uncontrolled field with other traffic in the area. Learjet maintenance personnel are still investigating the cause of the fire. It is suspected that a pinhole in a hydraulic line sprayed hydraulic fluid on the starter/generator to start the fire. However; the inspection of the engine is still underway. Supplemental information from acn 654199: there have been numerous false fire indications in the learjet 45 due to 2 common problems which are: 1) bleed air leak; 2) chafed fire loop. At this point there is an investigation ongoing to find what caused the problem; and I'm very eager to find out what caused the fire; but at this time I will not assume that it is bleed air leak or a chafed fire loop if I get a 'left or right engine fire' warning again.

Related reports:

Google
 

Original NASA ASRS Text

Title: AN LJ45 HAD AN ENG FIRE WARNING WHILE ON SHORT FINAL. NO EMER WAS DECLARED. UPON POST FLT INSPECTION; A CHARRED SPOT WAS FOUND ON ENG COWLING; ALONG WITH HYD FLUID LEAKING FROM THE ENG.

Narrative: ON SHORT FINAL; WE RECEIVED A 'L ENG FIRE' WARNING. ALL ENG INST INDICATIONS WERE NORMAL. I REDUCED PWR ON THE L ENG AND WE ELECTED TO CONTINUE THE APCH AND LNDG. THE LNDG WAS NORMAL AND UNEVENTFUL. AFTER CLRING THE RWY; WE SHUT DOWN THE L ENG. THE FIRE WARNING EXTINGUISHED SHORTLY (LESS THAN 30 SECONDS) AFTER THE ENG WAS SHUT DOWN. THE TAXI TO THE RAMP WAS NORMAL AND UNEVENTFUL. AFTER SHUTDOWN OF THE ACFT; THE POSTFLT INSPECTION REVEALED HYD FLUID LEAKING FROM THE BOTTOM OF THE L ENG. THERE WAS ALSO A CHARRED SPOT ON THE LOWER; FORWARD; R SIDE OF THE L ENG COWLING. WE DID NOT DECLARE AN EMER; AS THE EVENT HAPPENED ON SHORT FINAL INTO AN UNCTLED ARPT AND OUR ONLY COM WAS ON THE LCL CTAF. WE DECIDED THAT THE LNDG WAS SAFER THAN A GAR ON SHORT FINAL WITH A POSSIBLE ENG FIRE AT AN UNCTLED FIELD WITH OTHER TFC IN THE AREA. LEARJET MAINT PERSONNEL ARE STILL INVESTIGATING THE CAUSE OF THE FIRE. IT IS SUSPECTED THAT A PINHOLE IN A HYD LINE SPRAYED HYD FLUID ON THE STARTER/GENERATOR TO START THE FIRE. HOWEVER; THE INSPECTION OF THE ENG IS STILL UNDERWAY. SUPPLEMENTAL INFO FROM ACN 654199: THERE HAVE BEEN NUMEROUS FALSE FIRE INDICATIONS IN THE LEARJET 45 DUE TO 2 COMMON PROBS WHICH ARE: 1) BLEED AIR LEAK; 2) CHAFED FIRE LOOP. AT THIS POINT THERE IS AN INVESTIGATION ONGOING TO FIND WHAT CAUSED THE PROB; AND I'M VERY EAGER TO FIND OUT WHAT CAUSED THE FIRE; BUT AT THIS TIME I WILL NOT ASSUME THAT IT IS BLEED AIR LEAK OR A CHAFED FIRE LOOP IF I GET A 'L OR R ENG FIRE' WARNING AGAIN.

Data retrieved from NASA's ASRS site as of January 2009 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.