What was found
CREW COMMENTS: GOT HOT IN CABIN 74-79-81, HAVE TO OPERATE RT PACK IN STBY C TO HAVE A COMFORTABLE TEMP. *S/D* SUSPECT FAULTY HEAT EXCHANGER. REPLACED LEFT HEAT EXCHANGER IAW MM 21-51-02, OP CHECKED GOOD. AC OK FOR SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CREW COMMENTS: GOT HOT IN CABIN 74-79-81, HAVE TO OPERATE RT PACK IN STBY C TO HAVE A COMFORTABLE TEMP. *S/D* SUSPECT FAULTY HEAT EXCHANGER. REPLACED LEFT HEAT EXCHANGER IAW MM 21-51-02, OP CHECKED GOOD. AC OK FOR SERVICE.