|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||atc facility : bhm|
|Altitude||msl bound lower : 16000|
msl bound upper : 16000
|Controlling Facilities||tracon : gsp|
|Make Model Name||Cessna Citation Undifferentiated or Other Model|
|Operating Under FAR Part||Part 91|
|Navigation In Use||Other|
|Flight Phase||climbout : intermediate altitude|
|Route In Use||enroute : direct|
enroute airway : ztl
|Affiliation||government : faa|
|Function||controller : radar|
|Qualification||controller : radar|
|Experience||controller radar : 13|
controller supervisory : 2
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Anomaly||other anomaly other|
|Independent Detector||other controllera|
|Resolutory Action||none taken : unable|
|Primary Problem||Navigational Facility|
|Air Traffic Incident||other|
|ATC Facility||procedure or policy : unspecified|
Each sunday, it is normal practice for the hayleyville, al, (qpc) radar site to be shut down for maintenance for 4 hours. The radar site is 70 mi northwest of birmingham, al. With this outage, radar service is non existent between birmingham, huntsville, muscle shoals, columbus, ms and tuscaloosa, al. With the increasing amount of traffic in the area, this outage is creating more and more problems, not only for atlanta center, but memphis center and the air traffic involved. Most traffic is being restr to being held down to very low altitudes for long periods of time. Many times separation is being delegated to approach controls to separate en route traffic vs their departures until center can identify the aircraft on radar. Restrs are put in place between atlanta and memphis to require all aircraft at or below 14000 ft to be cleared via airways, but many times this will not cover the traffic due to the irregular tracking from the radar sites trying to cover the area. One instance occurred when a cessna citation departed bhm going to memphis, tn. The aircraft was climbed to 16000 due to traffic at 17000, even though the citation is a fast clber and was requesting above 23000. The traffic at 17000 was radar idented but no target was acquired on the citation until it was 80 mi northwest of bhm level at 16000. The outages for qpc should be scheduled on the midnight shift or for 4 hours earlier on sunday mornings before the traffic volume has increased, i.e. 0500 EST - 0900 EST. Traffic in this area begins to build after 0900 on sundays.
Original NASA ASRS Text
Title: ATC EQUIP PROB RADAR SHUT DOWN FOR MAINT. NON DETECTION OF ACFT BY OVERLAPPING RADAR SYS.
Narrative: EACH SUNDAY, IT IS NORMAL PRACTICE FOR THE HAYLEYVILLE, AL, (QPC) RADAR SITE TO BE SHUT DOWN FOR MAINT FOR 4 HRS. THE RADAR SITE IS 70 MI NW OF BIRMINGHAM, AL. WITH THIS OUTAGE, RADAR SERVICE IS NON EXISTENT BETWEEN BIRMINGHAM, HUNTSVILLE, MUSCLE SHOALS, COLUMBUS, MS AND TUSCALOOSA, AL. WITH THE INCREASING AMOUNT OF TFC IN THE AREA, THIS OUTAGE IS CREATING MORE AND MORE PROBS, NOT ONLY FOR ATLANTA CTR, BUT MEMPHIS CTR AND THE AIR TFC INVOLVED. MOST TFC IS BEING RESTR TO BEING HELD DOWN TO VERY LOW ALTS FOR LONG PERIODS OF TIME. MANY TIMES SEPARATION IS BEING DELEGATED TO APCH CTLS TO SEPARATE ENRTE TFC VS THEIR DEPS UNTIL CTR CAN IDENTIFY THE ACFT ON RADAR. RESTRS ARE PUT IN PLACE BTWN ATLANTA AND MEMPHIS TO REQUIRE ALL ACFT AT OR BELOW 14000 FT TO BE CLRED VIA AIRWAYS, BUT MANY TIMES THIS WILL NOT COVER THE TFC DUE TO THE IRREGULAR TRACKING FROM THE RADAR SITES TRYING TO COVER THE AREA. ONE INSTANCE OCCURRED WHEN A CESSNA CITATION DEPARTED BHM GOING TO MEMPHIS, TN. THE ACFT WAS CLBED TO 16000 DUE TO TFC AT 17000, EVEN THOUGH THE CITATION IS A FAST CLBER AND WAS REQUESTING ABOVE 23000. THE TFC AT 17000 WAS RADAR IDENTED BUT NO TARGET WAS ACQUIRED ON THE CITATION UNTIL IT WAS 80 MI NW OF BHM LEVEL AT 16000. THE OUTAGES FOR QPC SHOULD BE SCHEDULED ON THE MIDNIGHT SHIFT OR FOR 4 HOURS EARLIER ON SUNDAY MORNINGS BEFORE THE TFC VOLUME HAS INCREASED, I.E. 0500 EST - 0900 EST. TFC IN THIS AREA BEGINS TO BUILD AFTER 0900 ON SUNDAYS.
Data retrieved from NASA's ASRS site as of July 2007 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.