As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: F/AS IN REAR OF AIRCRAFT REPORTED STRONG ODOR ON TAXI OUT IN REAR. SMELL OF JET EXHAUST NOTICEABLE IN FRONT. RETURNED TO GATE. MAINTENANCE FOUND SOURCE TO BE APU LEAKING. ***SUPPLEMENTAL ACTION: SECT.4, 5 AND 6: REMOVED AND REPLACED APU TURBINE CAVITY VENT D-RINGS PER M. M. 49-91-53 & C/W APU WASH PER M. M. 49-00-00-100-001A.***(CLOSED)