 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Rptrs have questioned the radar coverage and safety data displayed, or at times not displayed, at ZHN cerap. Radar coverage is from a single antenna located on oahu island and is operational for approximately a 300 mi radius. Some tracking anomalies were found to be aircraft equipment and the operators cooperated in modifications to their transponder antenna system. Another problem idented was related to airspace deviations by controllers.
| Attributes | |
| ACN | 332359 |
| Time | |
| Date | 199604 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zhn |
| State Reference | HI |
| Altitude | msl bound lower : 0 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhn |
| Make Model Name | Cessna Single Turboprop Undifferentiated or Other Model |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | EC 135 |
| Operating Under FAR Part | other : other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 332359 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 332174 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Aircraft X traveling along V2 sebound toward lny VORTAC on 290 degree radial for arrival jets inbound to kahului, aircraft X turned to a 130 degree heading and lost radar data. Was unable to descend arrival traffic until radar contact was reestablished at lny 265 degree radial 12 DME. Safety data not being displayed to controller. Callback conversation with specialist revealed the following information: analyst was unable to contact any of the 3 rptrs. Called ZHN and spoke to a specialist regarding their radar coverage. Their antenna is located on the island of oahu and has coverage to approximately a 300 mi radius. He stated that part of the coverage problem was the transponder antenna location on several of the interisland cargo carriers. The operators of these carriers have modified their aircraft antennas and that has eliminated many problems regarding flight following at the outer islands. The other problem has allegedly been caused by several airspace deviations that involved controllers. During data reductions for investigation of these deviations, the controllers questioned the findings as to how valid they were. Specialist did not know if any ucr's had been filed. Supplemental information from acn 332167: military Y (C135) at FL250 climbing to FL370 from lih direct lny lost radar, safety data not being displayed to controller from approximately kaena point to kokohead over island of oahu.
Original NASA ASRS Text
Title: RPTRS HAVE QUESTIONED THE RADAR COVERAGE AND SAFETY DATA DISPLAYED, OR AT TIMES NOT DISPLAYED, AT ZHN CERAP. RADAR COVERAGE IS FROM A SINGLE ANTENNA LOCATED ON OAHU ISLAND AND IS OPERATIONAL FOR APPROX A 300 MI RADIUS. SOME TRACKING ANOMALIES WERE FOUND TO BE ACFT EQUIP AND THE OPERATORS COOPERATED IN MODIFICATIONS TO THEIR XPONDER ANTENNA SYS. ANOTHER PROB IDENTED WAS RELATED TO AIRSPACE DEVS BY CTLRS.
Narrative: ACFT X TRAVELING ALONG V2 SEBOUND TOWARD LNY VORTAC ON 290 DEG RADIAL FOR ARR JETS INBOUND TO KAHULUI, ACFT X TURNED TO A 130 DEG HDG AND LOST RADAR DATA. WAS UNABLE TO DSND ARR TFC UNTIL RADAR CONTACT WAS REESTABLISHED AT LNY 265 DEG RADIAL 12 DME. SAFETY DATA NOT BEING DISPLAYED TO CTLR. CALLBACK CONVERSATION WITH SPECIALIST REVEALED THE FOLLOWING INFO: ANALYST WAS UNABLE TO CONTACT ANY OF THE 3 RPTRS. CALLED ZHN AND SPOKE TO A SPECIALIST REGARDING THEIR RADAR COVERAGE. THEIR ANTENNA IS LOCATED ON THE ISLAND OF OAHU AND HAS COVERAGE TO APPROX A 300 MI RADIUS. HE STATED THAT PART OF THE COVERAGE PROB WAS THE XPONDER ANTENNA LOCATION ON SEVERAL OF THE INTERISLAND CARGO CARRIERS. THE OPERATORS OF THESE CARRIERS HAVE MODIFIED THEIR ACFT ANTENNAS AND THAT HAS ELIMINATED MANY PROBS REGARDING FLT FOLLOWING AT THE OUTER ISLANDS. THE OTHER PROB HAS ALLEGEDLY BEEN CAUSED BY SEVERAL AIRSPACE DEVS THAT INVOLVED CTLRS. DURING DATA REDUCTIONS FOR INVESTIGATION OF THESE DEVS, THE CTLRS QUESTIONED THE FINDINGS AS TO HOW VALID THEY WERE. SPECIALIST DID NOT KNOW IF ANY UCR'S HAD BEEN FILED. SUPPLEMENTAL INFO FROM ACN 332167: MIL Y (C135) AT FL250 CLBING TO FL370 FROM LIH DIRECT LNY LOST RADAR, SAFETY DATA NOT BEING DISPLAYED TO CTLR FROM APPROX KAENA POINT TO KOKOHEAD OVER ISLAND OF OAHU.
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.