As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"MAINT" LIGHT ON OVERHEAD PANEL ILLUMINATED ON LANDING. GROUNDED - YES. EEC CHANNEL A AND B IGNITION SYSTEMS TEST GOOD REF B737-9 AMM 71-00-00-730-804-G00, 805-G00. OPS CK GOOD. VISUALLY EXAMINED #1 ENGINE IGNITION SYSTEM, NO DEFECTS NOTED. REMOVED AND EXAMINED LEFT IGNITOR. NO UNUSUAL WEAR OR ISSUES NOTED. REPLACED BOTH #1 ENGINE IGNITORS REF AMM 74-21-02. OPS CKS GOOD.