As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 410 LEFT PACK "BLEED TRIP OFF" LIGHT CAME ON. RESET & LIGHT WENT OUT PER QRH. NORMAL PRESSURE RESTORED. FIVE MINUTES LATER LIGHT CAME BACK ON & AGAIN RESET & STAYED OUT. PRESSURE 30 PSI BOTH SIDES WERE THE SAME. REPLACED LT ENGINE BLEED AIR REGULATOR REF MM 36 11 03 OPS & LEAK CHECK.