Sponsors should keep in mind that conspicuity is achieved only when all recommended lights are working. Partial
equipment outages decrease the margin of safety. Any outage should be corrected as soon as possible. Failure
of a steady burning side or intermediate light should be corrected as soon as possible, but notification is not required.
Any failure or malfunction that lasts more than thirty (30) minutes and affects a top light or flashing obstruction
light, regardless of its position, should be reported immediately by either direct entry tool or by calling 877-487-6867,
for Alaska 800-478-3576, so a Notice to Airmen (NOTAM) can be issued. Start of Activity/End of Validity must be provided when
reporting. FCC receives notification upon Antenna Structure Registration (ASR) NOTAM issuance.
When reporting, please have available:
- Name of persons or organizations reporting light failures, including any title, address and phone number
- The type of Structure
- Location of structure (including latitude/longitude, if known, prominent structures, landmarks, etc...)
- Height of structure above ground level (AGL)/above mean sea level (AMSL), if known
**Circle Search may be used to obtain information for items 3. and 4.**
- Start of Activity/End of Validity
- For FCC Towers, the ASR Number, if known. If the ASR is not known indicate ASR UNKNOWN. (This is for structures that are regulated by the FCC)
- For Cranes, Stacks, etc., the Aeronautical Study Number (ASN), if known. If the ASN is not known indicate ASN UNKNOWN. (This is for structures studied by the FAA but not regulated by the FCC)
- For Wind Turbine Farms, if using latitude/longitude, provide the coordinates for the center point of the wind farm, or the coordinates for one of the turbines closest to the center.
As soon as normal operation is restored, or to extend the End of Validity time, report by direct entry tool
or by calling 877-487-6867, for Alaska 800-478-3576. Unless extended, NOTAMs will auto-cancel at their End of
Validity time (except when indicated as Permanent (PERM). The sponsor is responsible for extending the outage
date or reporting an earlier return to service date, if needed.
Advisory Circular 70/7460-1L, Obstruction Marking and lighting, describes the standards for
marking and lighting structures such as buildings, chimneys, antenna towers, cooling towers,
storage tanks, supporting structures of overhead wires, etc...
*In accordance with the current FAA JO 7930.2,
Notices to Airmen (NOTAM), effective 12/18/2015, the requirement for a 15-day expiration for ASR tower light NOTAMs was
eliminated from sub-paragraphs 5-2-2a-12(a) and (b). A realistic time frame to repair the tower light will be determined
and assigned as the valid time of the NOTAM when it is initially issued. The sponsor must provide an ending or expiration time.
FAA Advisory Circular 70/7460-1L, Obstruction Marking and Lighting,
effective 12/4/2015 will be revised to reflect this change in reporting timeframes.