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Captain of air carrier medium large transport aircraft reported problem with the accuracy of a navigational VORTAC.
| Attributes | |
| ACN | 219221 |
| Time | |
| Date | 199208 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : aml |
| State Reference | VA |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 7000 flight time type : 580 |
| ASRS Report | 219221 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
Narrative:
PF inbound aml 259 radial. We asked center our relation to course and were told on center when our CDI showed 2 degrees off-center to the left of course. Later, with the same 2 degrees off-center, the controller told us we were 7 mi right of course. This is a problem every time we fly into iad using the aml VOR. This VOR needs to be adjusted.
Original NASA ASRS Text
Title: CAPT OF ACR MLG ACFT RPTED PROBLEM WITH THE ACCURACY OF A NAVIGATIONAL VORTAC.
Narrative: PF INBOUND AML 259 RADIAL. WE ASKED CTR OUR RELATION TO COURSE AND WERE TOLD ON CTR WHEN OUR CDI SHOWED 2 DEGS OFF-CTR TO THE L OF COURSE. LATER, WITH THE SAME 2 DEGS OFF-CTR, THE CTLR TOLD US WE WERE 7 MI R OF COURSE. THIS IS A PROBLEM EVERY TIME WE FLY INTO IAD USING THE AML VOR. THIS VOR NEEDS TO BE ADJUSTED.
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.