What was found
LEFT PACK LIGHT ILLUMINATED ON CLIMB OUT AROUND FL290. GROUNDED - YES. DIVERSION TIME 52 MINUTES. ACCOMPLISHED PACK TEMP CONTROL BITE CHECK PER B737-800 FIM 21-62 TASK 801, FOUND LH RAM AIR ACTUATOR FAULTED. R/R RAM AIR ACTUATOR PER B737-800 AMM 21-51-21. R/R PACK TEMP CONTROLLER PER AMM 21-61-20. ALL OPS CHECKS PASSED. ACCOMPLISHED FIM 21-53 TASK 801, NO FAULTS FOUND. R/R AIR CONDITIONING ACCESSORY UNIT PER AMM 21-51-02. ACCOMPLISHED PACK FLOW TEMP CONTROLLER BITE TEST PER FIM 21-61-00. ALL TESTS PASSED.