What was found
FLT 4481 - DURING CRUISE FROM LEX-ATL AT APPROX 26,000 FEET, WHEN THE CREW INCREASED THE COCKPIT TEMPERATURE TO 43 DEGREES CELSIUS A FUEL SMELL OCCURRED. THE SMELL DIMINISHED BUT REMAINED NOTICEABLE WHEN THE CREW DECREASED THE TEMPERATURE TO 3 DEGREES CELSIUS. THE AIRCRAFT LANDED SAFELY IN ATL. MAINTENANCE REMOVED AND REPLACED THE AUXILIARY POWER UNIT FUEL LINE ELBOW. OPERATIONAL AND LEAK CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)