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Tri TRACON controller reported a small transport tracked off assigned route; entering higher MVA.
| Attributes | |
| ACN | 1565527 |
| Time | |
| Date | 201808 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | TRI.TRACON |
| State Reference | TN |
| Aircraft 1 | |
| Make Model Name | Small Transport Low Wing 2 Recip Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT |
Narrative:
Aircraft X had been issued direct to cabya for the RNAV 6 approach into 0a9. The aircraft had been tracking direct to the fix for approximately 30 miles before I cleared the aircraft to cross cabya at 5;300 and advised he was cleared for the approach. The aircraft was well clear of terrain at his altitude and direct to cabya. I go on and do a couple of other position related tasks and notice aircraft X well south of course about to enter 6;700 MVA. I issued the aircraft a turn to 360 to clear the aircraft of the MVA. The aircraft may have entered the 6;700 MVA; but was quickly clear of the MVA as I had caught it just as he was about to enter the higher MVA. Once I got the aircraft clear of the terrain I asked why he had gone off course. The aircraft told me he was just setting himself up to be straight in outside of cabya. I advised the aircraft that if he has been cleared direct a fix that he has to navigate direct the fix and if he wants other routing he needs to let me know in advance and I can set them up to be above the MVA. The pilot acknowledged. I should have noticed the southern turn of the aircraft before I did. I had assumed the aircraft who had been tracking for 30 miles direct the fix would still be direct the fix.
Original NASA ASRS Text
Title: TRI TRACON Controller reported a small transport tracked off assigned route; entering higher MVA.
Narrative: Aircraft X had been issued direct to CABYA for the RNAV 6 approach into 0A9. The aircraft had been tracking direct to the fix for approximately 30 miles before I cleared the aircraft to cross CABYA at 5;300 and advised he was cleared for the approach. The aircraft was well clear of terrain at his altitude and direct to CABYA. I go on and do a couple of other position related tasks and notice Aircraft X well south of course about to enter 6;700 MVA. I issued the aircraft a turn to 360 to clear the aircraft of the MVA. The aircraft may have entered the 6;700 MVA; but was quickly clear of the MVA as I had caught it just as he was about to enter the higher MVA. Once I got the aircraft clear of the terrain I asked why he had gone off course. The aircraft told me he was just setting himself up to be straight in outside of CABYA. I advised the aircraft that if he has been cleared direct a fix that he has to navigate direct the fix and if he wants other routing he needs to let me know in advance and I can set them up to be above the MVA. The pilot acknowledged. I should have noticed the southern turn of the aircraft before I did. I had assumed the aircraft who had been tracking for 30 miles direct the fix would still be direct the fix.
Data retrieved from NASA's ASRS site 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.