As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT PACK OUTPUT TEMPS ARE ERRATIC IN MANUAL MODE. IN N POS: 118 DEGREES, IN W POS: 62 DEGREES. REPLACED STBY PACK OUT TEMP SENSOR, NO HELP. STBY MODE INOP. OK AUTO. REPLACED TS 199 RT PACK TEMP SENSOR. SYSTEM OPS CHECKS NORMAL. ACCOMPLISHED BITE OF L-H PTC, FOUND PACK TEMP SENSOR FAULT. REPLACED LT PACK TEMP SENSOR AND ACP BITE A SECOND TIME AND ALL OK, NO FAULTS NOTED.