As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB AND FIRST FEW MINUTES AT CRUISE FL 250 STRONG PUNGENT SMELL NOTED MID-CABIN ROW 11' AND IN FLIGHT DECK, SMELL DISSIPATED AFTER 15 MINUTES NO SMOKE. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU DUE TO FINDING EVIDENCE OF AN OIL LEAK. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)