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Pilot of small aircraft had problem communicating with ZDV from location on western slope of rockies, approximately 150 miles west of denver.
| Attributes | |
| ACN | 121119 |
| Time | |
| Date | 198908 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : fnl airport : 33v |
| State Reference | CO |
| Altitude | msl bound lower : 11500 msl bound upper : 11500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other landing other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial |
| Experience | flight time last 90 days : 100 flight time total : 2200 flight time type : 100 |
| ASRS Report | 121119 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera other other : unspecified cockpit |
| Resolutory Action | controller : provided flight assist none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility |
Narrative:
On 8/sat/89, small aircraft X was en route to fort collins-loveland airport, and requested assistance from ATC. As small aircraft X approached the mountains west of fort collins-loveland airport at 11500', it was obvious they were too high to cross. X was unable to contact flight control. After several attempts, an intermediary began to relay messages to the ATC. X could hear the xmissions, whereas ATC could not receive from this area the transmission of X. After some time elapsed, X headed to laramie as directed, but returned and landed at walden field. In retrospect, it appears this area is a dead spot in ATC reception capacity. X made a normal landing on walden field and called longmont ATC center to advise of the same landing at walden. The following day X continued on with the flight to fort collins-loveland.
Original NASA ASRS Text
Title: PLT OF SMA HAD PROBLEM COMMUNICATING WITH ZDV FROM LOCATION ON WESTERN SLOPE OF ROCKIES, APPROX 150 MILES WEST OF DENVER.
Narrative: ON 8/SAT/89, SMA X WAS ENRTE TO FORT COLLINS-LOVELAND ARPT, AND REQUESTED ASSISTANCE FROM ATC. AS SMA X APCHED THE MOUNTAINS W OF FORT COLLINS-LOVELAND ARPT AT 11500', IT WAS OBVIOUS THEY WERE TOO HIGH TO CROSS. X WAS UNABLE TO CONTACT FLT CTL. AFTER SEVERAL ATTEMPTS, AN INTERMEDIARY BEGAN TO RELAY MESSAGES TO THE ATC. X COULD HEAR THE XMISSIONS, WHEREAS ATC COULD NOT RECEIVE FROM THIS AREA THE XMISSION OF X. AFTER SOME TIME ELAPSED, X HEADED TO LARAMIE AS DIRECTED, BUT RETURNED AND LANDED AT WALDEN FIELD. IN RETROSPECT, IT APPEARS THIS AREA IS A DEAD SPOT IN ATC RECEPTION CAPACITY. X MADE A NORMAL LNDG ON WALDEN FIELD AND CALLED LONGMONT ATC CENTER TO ADVISE OF THE SAME LNDG AT WALDEN. THE FOLLOWING DAY X CONTINUED ON WITH THE FLT TO FORT COLLINS-LOVELAND.
Data retrieved from NASA's ASRS site as of August 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.