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BE40 flight crew reported a failure to begin a descent when cleared for a crossing restriction on the route of flight.
| Attributes | |
| ACN | 1480347 |
| Time | |
| Date | 201709 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Beechjet 400 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Undershoot Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Clearance Flight Deck / Cabin / Aircraft Event Other / Unknown |
Narrative:
We were assigned a crossing restriction to cross ZZZ VOR at FL180. I watched my copilot adjust the altitude selector and program the FMS. I reprogrammed the angle of descent and was certain I selected VNAV myself on the mode select panel. We were the only aircraft in the sky last night so everything was silent. We were just cruising along when I started wondering about our next ATC handoff. That's when I noticed we were crossing ZZZ VOR still at FL310. VNAV had apparently not been selected. I immediately initiated a descent and as soon as the descent was establish the controller; sounding a little confused; gave us that frequency change I had been waiting for.
Original NASA ASRS Text
Title: BE40 flight crew reported a failure to begin a descent when cleared for a crossing restriction on the route of flight.
Narrative: We were assigned a crossing restriction to cross ZZZ VOR at FL180. I watched my copilot adjust the altitude selector and program the FMS. I reprogrammed the angle of descent and was certain I selected VNAV myself on the mode select panel. We were the only aircraft in the sky last night so everything was silent. We were just cruising along when I started wondering about our next ATC handoff. That's when I noticed we were crossing ZZZ VOR still at FL310. VNAV had apparently not been selected. I immediately initiated a descent and as soon as the descent was establish the controller; sounding a little confused; gave us that frequency change I had been waiting for.
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.