As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4749 - DURING DESCENT FROM SRQ-ATL, A STRONG BURNING ODOR OCCURRED FOR APPROXIMATELY ONE MINUTE WHEN THE POWER WAS BROUGHT FROM IDLE TO CRUISE WITH THE ENGINE BLEEDS ON. THE ODOR DID NOT OCCUR WHEN THE BLEEDS WERE SELECTED TO THE AUXILIARY POWER UNIT. THE AIRCRAFT LANDED SAFELY IN ATL. MAINTENANCE REMOVED AND REPLACED THE PRESSURE REGULATING SHUTOFF VALVE ON THE TENTH STAGE BLEED AIR SYSTEM. OPERATIONAL CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)