As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L IRS FAULT LIGHT ILLUMINATED WHEN TAXIING FOR TAKE OFF AC BTB GROUNDED AND DEFERRED IAW ABX-34-21-1-1-1A ,A/C FLOWN TO SBD MX,GROUNDED AC REMOVED AND REPLACED LEFT IRU IAW AMM 34-21-01. IRU TEST PASSED. MCDP TEST 30 SHOWED NO FAULTS. THIS CLOARS DI 45871. PLACARDS REMOVED. NO REACTIVATION PROCEDURES APPY. A/C RALM DOWNGRADED TO CAT 1, PENDING MCDP TESTS 30 & 40. REF LP : 38658-62/3.AC RETURNED TO SERVICE