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Controller reporter claims there is an intermittent radio blind spot on the approach end of runway 5R. A commuter aircraft was in position and waiting release for a landing aircraft to clear the runway with another aircraft on final approach. Controller could not communicate with the aircraft holding in position and used a backup transceiver to establish communication.
| Attributes | |
| ACN | 332599 |
| Time | |
| Date | 199603 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : rdu |
| State Reference | NC |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Shorts SD-360 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : takeoff ground : holding |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Bonanza 33 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller non radar : 9 controller radar : 3 |
| ASRS Report | 332599 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
Aircraft #1 was instructed to taxi into position and hold. Aircraft #2 had already been issued landing clearance. Traffic information was already exchanged between both aircraft. When the preceding arrival had cleared the runway, the SH36 was issued takeoff clearance. No acknowledgement. The aircraft was in a radio 'blind spot' on runway 5R. The SH36 was finally contacted by the use of a backup transceiver which has a different antenna location than the primary. The appropriate runway separation was maintained between the SH36 and the BE33, but not by much.
Original NASA ASRS Text
Title: CTLR RPTR CLAIMS THERE IS AN INTERMITTENT RADIO BLIND SPOT ON THE APCH END OF RWY 5R. A COMMUTER ACFT WAS IN POS AND WAITING RELEASE FOR A LNDG ACFT TO CLR THE RWY WITH ANOTHER ACFT ON FINAL APCH. CTLR COULD NOT COMMUNICATE WITH THE ACFT HOLDING IN POS AND USED A BACKUP TRANSCEIVER TO ESTABLISH COM.
Narrative: ACFT #1 WAS INSTRUCTED TO TAXI INTO POS AND HOLD. ACFT #2 HAD ALREADY BEEN ISSUED LNDG CLRNC. TFC INFO WAS ALREADY EXCHANGED BTWN BOTH ACFT. WHEN THE PRECEDING ARR HAD CLRED THE RWY, THE SH36 WAS ISSUED TKOF CLRNC. NO ACKNOWLEDGEMENT. THE ACFT WAS IN A RADIO 'BLIND SPOT' ON RWY 5R. THE SH36 WAS FINALLY CONTACTED BY THE USE OF A BACKUP TRANSCEIVER WHICH HAS A DIFFERENT ANTENNA LOCATION THAN THE PRIMARY. THE APPROPRIATE RWY SEPARATION WAS MAINTAINED BTWN THE SH36 AND THE BE33, BUT NOT BY MUCH.
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.