As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THRU FL290 FIRST OFFICER & THE CAPTAIN DETECTED AN ACRID SMELL. THE FIRST OFFICER SAW A VERY THIN LAYER OF LIGHT GRAY SMOKE IN THE VICINITY OF HIS OVERHEAD UTILITY LIGHT. SMOKE & FUMES IMMEDIATELY BEGAN TO DISSIPATE. NO ELEC ARCING OR OTHER EVIDENCE OF FIRE WAS NOTED. R & R R1 WINDOW IAW MM.