As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING & AFTER LG RETRACTION A RUBBER BURNING SMELL WAS IN THE COCKPIT, SOUNDS WERE NORMAL. R & R LT & RT PRESS REGULATOR CONTROLLERS IAW AMM 21-31-01. PERFORMED A LEAK CHECK OF BOTH VLVS & PERFORMED A PACK BURN OUT IAW AMM 21-92-12. SYS CHECKED NORMAL.