As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INITIATING DECENT, WHEN THE THROTTLES WERE REDUCED AND THE PAC HP VALVE OPEN L-R CAS MESSAGE APPEARS, THERE IS A STRONG ODOR OF BURNING RUBBER. REMOVED AND REPLACED A DEFECTIVE HP VALVE ON NR 1 ENGINE. LEAK AND OPS CHECKED GOOD IAW AMM 36-10-00.