As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED ACRID BURNT RUBBER SMELL DURING TAKEOFF INITIAL CLIMB. THE SMELL DISSIPATED DURING FLIGHT. INSTALLED SERVICEABLE LT & RT PRSOVS VLV 5426 IAW AMM 21-31-01. RAN ENGS AT IDLE & TAKEOFF, NO LEAKS OR ODORS NOTED. OPERATIONALLY CHECKED NORMAL. OK FOR SERVICE.