What was found
ATC FAIL LIGHT ILLUMINATED DURING PUSH BACK AC RETURNED TO GATE AND MTX GROUNDED AC, MTX TROUBLE SHOT THEY REMOVED AND REPLACED TRANSPONDER CONTROL PANEL IAW B767 AMM 34-53-02 OPS CHECK GOOD MTX RETURNED AC TO SERVICE .
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ATC FAIL LIGHT ILLUMINATED DURING PUSH BACK AC RETURNED TO GATE AND MTX GROUNDED AC, MTX TROUBLE SHOT THEY REMOVED AND REPLACED TRANSPONDER CONTROL PANEL IAW B767 AMM 34-53-02 OPS CHECK GOOD MTX RETURNED AC TO SERVICE .