 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Twf controller reported an IFR handoff; improperly cleared for an approach; resulted in a descent below the MVA.
| Attributes | |
| ACN | 1584552 |
| Time | |
| Date | 201810 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | TWF.TRACON |
| State Reference | ID |
| Aircraft 1 | |
| Make Model Name | Small Transport |
| Flight Phase | Descent |
| Route In Use | Other VOR A |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 8 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT |
Narrative:
ZLC called to coordinate aircraft X on VOR a approach to ZZZ. ZLC said they would clear the aircraft on the approach and then ship the aircraft to twf for arrival to ZZZ. Aircraft checked on with me and verified that ZLC had cleared on the approach. A few minutes later ZLC called and said they observed the aircraft was descending and said they may need a low altitude alert. Altitude alert was given to the aircraft and altitude to maintain and the aircraft said the terrain was in sight and was providing visual separation from terrain. Brasher warning was issued and aircraft X arrived at ZZZ without further incident. I called ZLC afterwards and ZLC said they had issued the approach clearance to the ZZZ airport. They did not include a crossing restriction for the aircraft to the IAF; rather they thought the pilot would adhere to published altitudes on the airway until reaching the IAF. In the future; I will probably not issue an approach clearance or approve an approach clearance without providing altitude guidance to the IAF regardless of route.
Original NASA ASRS Text
Title: TWF controller reported an IFR handoff; improperly cleared for an approach; resulted in a descent below the MVA.
Narrative: ZLC called to coordinate Aircraft X on VOR A approach to ZZZ. ZLC said they would clear the aircraft on the approach and then ship the aircraft to TWF for arrival to ZZZ. Aircraft checked on with me and verified that ZLC had cleared on the approach. A few minutes later ZLC called and said they observed the aircraft was descending and said they may need a low altitude alert. Altitude alert was given to the aircraft and altitude to maintain and the aircraft said the terrain was in sight and was providing visual separation from terrain. Brasher warning was issued and Aircraft X arrived at ZZZ without further incident. I called ZLC afterwards and ZLC said they had issued the approach clearance to the ZZZ airport. They did not include a crossing restriction for the aircraft to the IAF; rather they thought the pilot would adhere to published altitudes on the airway until reaching the IAF. In the future; I will probably not issue an approach clearance or approve an approach clearance without providing altitude guidance to the IAF regardless of route.
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.