What was found
NR 1 CABIN PRESSURE CONTROLLER WILL NOT POWER UP. ACFT GROUNDED. REMOVED NR 1 PRESSURE CONTROLLER IAW AMM 21-31-01-000-801, INSTALLED NR 1 PRESSURE CONTROLLER, NR 1 IAW 21-31-01-400-801, OPS CHECK GOOD IAW ETOPS AMM 21-31-00-700-802.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
NR 1 CABIN PRESSURE CONTROLLER WILL NOT POWER UP. ACFT GROUNDED. REMOVED NR 1 PRESSURE CONTROLLER IAW AMM 21-31-01-000-801, INSTALLED NR 1 PRESSURE CONTROLLER, NR 1 IAW 21-31-01-400-801, OPS CHECK GOOD IAW ETOPS AMM 21-31-00-700-802.