As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG EEC C1 R DISPLAYED ON STATUS PAGE. DO NOT USE THERMOCOUPLE 280-4257, THE CORRECT PW4090 PCN IS 223-1593. REPLACED 'B' CHANNEL THERMOCOUPLES ON THE 2.9 START STABILITY BLEED VLV 2 EACH AT 2 AND 10 O'CLOCK POSITION ON NR 2 ENGINE IAW AMM.