Narrative:

Facility was struck by lightning; causing all frequencys to go OTS. Facility has been on portable back-up radios since strike happened.

Google
 

Original NASA ASRS Text

Title: LOU CTLR DESCRIBED LIGHTNING EVENT THAT DISABLED ALL PRIMARY RADIO FREQS; LEAVING TWR WITH ONLY PORTABLE BACK-UP RADIOS FOR OPS.

Narrative: FACILITY WAS STRUCK BY LIGHTNING; CAUSING ALL FREQS TO GO OTS. FACILITY HAS BEEN ON PORTABLE BACK-UP RADIOS SINCE STRIKE HAPPENED.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.