What was found
INSPECTION TYPE:NA** ATB SDR FILED** NO EMERGENCY DEC'D**A/C LANDED W/OUT INCIDENT** LEVEL 2 "AIR SYS 3 PRES LO" AIR TURN BACK DUE TO ICING COND AT DEST.R&R HIGH STAGE MANIFOLD PRESSURE SENSOR PER AMM 36-12-04-000-801, OPS CHECK, SYSTEM CHECK NORMAL, FOB BEFORE ENG. RUN 39,800 FOB AFTER ENG RUN 39,000 IPC 36-11-20-04