What was found
NR 1 ENGINE HIGH STAGE REGULATOR FAILED REVERSE FLOW DIAPHRAM TEST DURING ENGINE BLEED AIR HEALTH CHECK TASK CARD. ACFT GROUNDED. REPLACED NR 1 ENGINE HIGH STAGE REGULATOR. LEAK, OPS CHECK OK, REF MM 36-11-07.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
NR 1 ENGINE HIGH STAGE REGULATOR FAILED REVERSE FLOW DIAPHRAM TEST DURING ENGINE BLEED AIR HEALTH CHECK TASK CARD. ACFT GROUNDED. REPLACED NR 1 ENGINE HIGH STAGE REGULATOR. LEAK, OPS CHECK OK, REF MM 36-11-07.