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Super king air 300 flight crew reported confusion over ATC vectors and relied on automation incorrectly; causing a low altitude alert.
| Attributes | |
| ACN | 1696437 |
| Time | |
| Date | 201910 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Super King Air 300 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Initial Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 135 Flight Crew Total 12568 Flight Crew Type 1320 |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT |
Narrative:
During approach into ZZZ; approach controller gave us a vector and said intercept final approach course. Because the final approach course was offset from the course between zzzzz and ZZZZZ1; the PIC queried him as to whether he wanted us to intercept 335 course to the runway or course between zzzzz and ZZZZZ1. Response was; 'intercept the final approach course.'upon reaching zzzzz; extended centerline off of runway (final approach course). Controller said something to the effect of; 'you went a little past it; turn right (I think he gave us a heading); cleared for the approach. Then handed us off to tower.armed the approach; armed VNAV. As I was inside zzzzz at 3;000 feet (minimum at zzzzz was 2;200 feet); began descent to glide path (gp). The PIC disengaged the autopilot as we descended through gp and corrected up toward glide path at the same time as tower gave us a 'low altitude alert; check altitude immediately.' the PIC corrected to glidepath; acquired the runway prior to reaching the MDA; set missed approach altitude and descended for an otherwise uneventful landing.
Original NASA ASRS Text
Title: Super King Air 300 flight crew reported confusion over ATC vectors and relied on automation incorrectly; causing a low altitude alert.
Narrative: During approach into ZZZ; Approach Controller gave us a vector and said intercept final approach course. Because the final approach course was offset from the course between ZZZZZ and ZZZZZ1; the PIC queried him as to whether he wanted us to intercept 335 course to the runway or course between ZZZZZ and ZZZZZ1. Response was; 'intercept the final approach course.'Upon reaching ZZZZZ; extended centerline off of runway (final approach course). Controller said something to the effect of; 'you went a little past it; turn right (I think he gave us a heading); cleared for the approach. Then handed us off to Tower.Armed the approach; armed VNAV. As I was inside ZZZZZ at 3;000 feet (minimum at ZZZZZ was 2;200 feet); began descent to Glide Path (GP). The PIC disengaged the autopilot as we descended through GP and corrected up toward glide path at the same time as Tower gave us a 'low altitude alert; check altitude immediately.' The PIC corrected to glidepath; acquired the runway prior to reaching the MDA; set missed approach altitude and descended for an otherwise uneventful landing.
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.