Reporter stated the aircraft dropped off at 4000 ft and did not go into the coast suspend list. Two ...

Attributes
ACN	331997
Time
Date	199604
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pob
State Reference	NC
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : fay
Operator	other
Make Model Name	Hercules (C-130)
Operating Under FAR Part	other : other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 22
ASRS Report	331997
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Air Traffic Incident	other
Situations
Navigational Aid	Unspecified

Narrative:

A military C130 departed pope aaf. 10 mi northwest of pope out of 4000 ft the aircraft dropped off the radar screen. It did not go into the coast suspend list. I checked the ZDC and rdu approach and both facilities had good targets and good mode C. Out of 10200 ft the aircraft retagged. This is a fairly common problem at fay. It seems that no one here thinks it's that big of a problem. It is reported almost daily to the supervisor but never is put into the daily log. Callback conversation with reporter revealed the following information: reporter stated that the problem is not limited to a specific area. He said that he was the track owner when the reported target dropped and that there was no coasting displayed, nor did the data go into the coast/suspend list. He initially felt that the target drop had something to do with the aircraft but when other facilities were observing the target he changed his mind and now feels it is a radar problem. Reporter indicated that facility maintenance is attempting to find and correct the problem.

Original NASA ASRS Text

Title: RPTR STATED THE ACFT DROPPED OFF AT 4000 FT AND DID NOT GO INTO THE COAST SUSPEND LIST. TWO ADJACENT FACILITIES HAD GOOD TARGETS AND MODE C ON THE ACFT. THE ACFT RETAGGED AT 10200 FT.

Narrative: A MIL C130 DEPARTED POPE AAF. 10 MI NW OF POPE OUT OF 4000 FT THE ACFT DROPPED OFF THE RADAR SCREEN. IT DID NOT GO INTO THE COAST SUSPEND LIST. I CHKED THE ZDC AND RDU APCH AND BOTH FACILITIES HAD GOOD TARGETS AND GOOD MODE C. OUT OF 10200 FT THE ACFT RETAGGED. THIS IS A FAIRLY COMMON PROB AT FAY. IT SEEMS THAT NO ONE HERE THINKS IT'S THAT BIG OF A PROB. IT IS RPTED ALMOST DAILY TO THE SUPVR BUT NEVER IS PUT INTO THE DAILY LOG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THE PROB IS NOT LIMITED TO A SPECIFIC AREA. HE SAID THAT HE WAS THE TRACK OWNER WHEN THE RPTED TARGET DROPPED AND THAT THERE WAS NO COASTING DISPLAYED, NOR DID THE DATA GO INTO THE COAST/SUSPEND LIST. HE INITIALLY FELT THAT THE TARGET DROP HAD SOMETHING TO DO WITH THE ACFT BUT WHEN OTHER FACILITIES WERE OBSERVING THE TARGET HE CHANGED HIS MIND AND NOW FEELS IT IS A RADAR PROB. RPTR INDICATED THAT FACILITY MAINT IS ATTEMPTING TO FIND AND CORRECT THE PROB.

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.

Reporter stated the aircraft dropped off at 4000 ft and did not go into the coast suspend list. Two adjacent facilities had good targets and mode C on the aircraft. The aircraft retagged at 10200 ft.