As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE PILOTS WERE INFORMED THAT 3/4 FA'S SMELLED A VERY SLIGHT BURNING PLASTIC ODOR JUST AFTER THE PLANE KIFTED OFF. THE ODOR LASTED FOR 15 SECONDS. IT WAS NOT SMELT BY THE PILOTS AND THERE WERE NO ABNORMAL INDICATIONS. FWD & AFT GALLEY DOOR HEATORS INOP IAW AMM 21-45. REPLACED HEATER POWER RELAY EIN R560. (LP 9543138 - AIRCRAFT WAS GROUNDED)