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Light transport air carrier deviated 5 mi east of V275. Reporter blames weak signal from dqn VORTAC when 65 miles north at 9000'.
| Attributes | |
| ACN | 81756 |
| Time | |
| Date | 198802 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dqn |
| State Reference | OH |
| Altitude | msl bound lower : 9000 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, High Wing, 2 Turboprop Eng |
| Navigation In Use | other vortac |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors enroute : direct enroute airway : v275 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 6700 flight time type : 1100 |
| ASRS Report | 81756 |
| Person 2 | |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance none taken : anomaly accepted other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
We were operating a scheduled trip on V275 between dayton and detroit metropolitan. About 65 mi north of dqn VOR, cle center advised us to turn 20 degrees left and reintercept V275. He advised us he showed us 5 mi east of centerline. However, navigation #1 and #2 both showed us to be nearly on centerline, but oscillating slightly with maximum deviations of 1/4 DOT off being centered to the east of course. I have noticed on previous trips that dqn VOR becomes weak ad somewhat unreliable approximately 60 mi north of the dqn VOR. Our filed route takes V275 from dayton VOR to moter intersection, direct dtw. Kline intersection is 75 mi out of dqn on V275, at which point we switch to salem (svm) VOR. At a cruise altitude of 9000' MSL, and at 65 DME from the station, a weak or unreliable signal from the dqn VOR could have caused the deviation from centerline. 6000' MSL is the published MEA for that portion of the arwy.
Original NASA ASRS Text
Title: LTT ACR DEVIATED 5 MI E OF V275. REPORTER BLAMES WEAK SIGNAL FROM DQN VORTAC WHEN 65 MILES NORTH AT 9000'.
Narrative: WE WERE OPERATING A SCHEDULED TRIP ON V275 BTWN DAYTON AND DETROIT METRO. ABOUT 65 MI N OF DQN VOR, CLE CENTER ADVISED US TO TURN 20 DEGS LEFT AND REINTERCEPT V275. HE ADVISED US HE SHOWED US 5 MI E OF CENTERLINE. HOWEVER, NAV #1 AND #2 BOTH SHOWED US TO BE NEARLY ON CENTERLINE, BUT OSCILLATING SLIGHTLY WITH MAX DEVIATIONS OF 1/4 DOT OFF BEING CENTERED TO THE E OF COURSE. I HAVE NOTICED ON PREVIOUS TRIPS THAT DQN VOR BECOMES WEAK AD SOMEWHAT UNRELIABLE APPROX 60 MI N OF THE DQN VOR. OUR FILED ROUTE TAKES V275 FROM DAYTON VOR TO MOTER INTXN, DIRECT DTW. KLINE INTXN IS 75 MI OUT OF DQN ON V275, AT WHICH POINT WE SWITCH TO SALEM (SVM) VOR. AT A CRUISE ALT OF 9000' MSL, AND AT 65 DME FROM THE STATION, A WEAK OR UNRELIABLE SIGNAL FROM THE DQN VOR COULD HAVE CAUSED THE DEVIATION FROM CENTERLINE. 6000' MSL IS THE PUBLISHED MEA FOR THAT PORTION OF THE ARWY.
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.