As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT 10TH ARM OPEN AND LT PACK OFF STATUS MESSAGES DURING CLIMBOUT. LT PACK WOULD NOT TURN ON. ONCE AT THE GATE WHILE SHUTTING DOWN, DURING POWER TRANSFER FROM THE ENGINE GENERATORS TO THE APU GENERATOR, THE LT PACK TURNED BACK ON. PERFORMED OPS CHECK OF LT PACK IAW AMM. OPS CHECKED GOOD AT THIS TIME. NO DEFECTS NOTED.