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ARTCC radar controller concerned with frequency reliability when he was unable to communication with a military BE40 departing an ir route segment. The aircraft, also unable to communication with ARTCC, initiated their own climb due to terrain upon exiting the ir route.
| Attributes | |
| ACN | 422307 |
| Time | |
| Date | 199812 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sot |
| State Reference | TN |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | other |
| Make Model Name | Beechjet 400 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other |
| Flight Phase | cruise other cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 6 controller radar : 18 |
| ASRS Report | 422307 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : military |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
The aircraft in question exited IR002 south of the sot VOR and I could not talk to them. The WX was IFR above 7000 ft. The aircraft had to climb above the MEA and proceed without a clearance. This frequency, 134.8, has been reported many times and nothing seems to be working. Callback conversation with controller at facility revealed the following information: the 2 ir rtes terminating in the vicinity of sot VOR are IR743 and IR002. These 2 training rtes are not frequently utilized, but when they are it is usually F18/18's. The published frequencys for these rtes are 127.55/269.50. Frequency 134.8 is a low altitude sector frequency, well east of the ir rtes. 134.8 has its own problems due to mountainous terrain. Problems arise with traffic below 10000 ft through that area.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR CONCERNED WITH FREQ RELIABILITY WHEN HE WAS UNABLE TO COM WITH A MIL BE40 DEPARTING AN IR RTE SEGMENT. THE ACFT, ALSO UNABLE TO COM WITH ARTCC, INITIATED THEIR OWN CLB DUE TO TERRAIN UPON EXITING THE IR RTE.
Narrative: THE ACFT IN QUESTION EXITED IR002 S OF THE SOT VOR AND I COULD NOT TALK TO THEM. THE WX WAS IFR ABOVE 7000 FT. THE ACFT HAD TO CLB ABOVE THE MEA AND PROCEED WITHOUT A CLRNC. THIS FREQ, 134.8, HAS BEEN RPTED MANY TIMES AND NOTHING SEEMS TO BE WORKING. CALLBACK CONVERSATION WITH CTLR AT FACILITY REVEALED THE FOLLOWING INFO: THE 2 IR RTES TERMINATING IN THE VICINITY OF SOT VOR ARE IR743 AND IR002. THESE 2 TRAINING RTES ARE NOT FREQUENTLY UTILIZED, BUT WHEN THEY ARE IT IS USUALLY F18/18'S. THE PUBLISHED FREQS FOR THESE RTES ARE 127.55/269.50. FREQ 134.8 IS A LOW ALT SECTOR FREQ, WELL E OF THE IR RTES. 134.8 HAS ITS OWN PROBS DUE TO MOUNTAINOUS TERRAIN. PROBS ARISE WITH TFC BELOW 10000 FT THROUGH THAT AREA.
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.