As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT PRESSURE SPLIT BETWEEN LEFT AND RIGHT DUCT. T/O CLIMB L12, R40. FL180 L15, R40. CRUISE FL380 L17, R35. FL220 L14, R21. AIRCRAFT HAS HISTORY REF LP 60095940. GROUNDED - YES. ACCOMP ENG BLEED HEALTH CK ON #1 ENG REF B737-800 AMM 36-11-00 FOUND 450 STAT SENSE LINE BLOWN OUT. REMOVED AND REPLACED #1 ENG 450 STAT SENSE LINE LK CK GOOD REF AMM 36-11-00.