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C90 pilot operating a skydiving mission; reported getting slow at 14;000 feet as the jumpers begin grouping in and outside the aircraft for a group jump. The left wing stalled and the aircraft enters a one turn spin to the left before the recovery. An aft cg may also have been an issue as the divers moved to the door and behind it at very low airspeed.
| Attributes | |
| ACN | 1334148 |
| Time | |
| Date | 201602 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | King Air C90 E90 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Flight Plan | VFR |
| Person 1 | |
| Function | Pilot Flying Single Pilot |
| Qualification | Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 300 Flight Crew Total 1100 Flight Crew Type 60 |
| Events | |
| Anomaly | Deviation - Procedural Weight And Balance Deviation - Speed All Types Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
I was operating a skydive flight at 14;000 feet flaps were set at 60% on the final portion of the jump run. I turned the green light on to indicate to the skydivers it was safe to climb out. As jumpers climbed out of the aircraft; my speed was 80 KIAS and with the added drag of three jumpers climbing outside I observed the speed slow to 75KIAS. With all skydivers going out in one large group; an aft-cg situation was encountered. Two jumpers were seated aft of the door in a location where we ask them not to sit. Some of the remaining skydivers had moved further aft from their original seated positions.as I was about to push the power forward to accelerate; the airspeed indicator had an instantaneous decay of 8 KIAS. Less than a second later the left wing stalled and the aircraft entered into a one turn spin. I immediately executed spin-recovery procedures. I believe my aerobatic experience and upset prevention and recovery training was a large factor in a quick response and successful recovery. Speed and g-load limits were not exceeded for the aircraft configuration.
Original NASA ASRS Text
Title: C90 pilot operating a skydiving mission; reported getting slow at 14;000 feet as the jumpers begin grouping in and outside the aircraft for a group jump. The left wing stalled and the aircraft enters a one turn spin to the left before the recovery. An aft CG may also have been an issue as the divers moved to the door and behind it at very low airspeed.
Narrative: I was operating a skydive flight at 14;000 feet Flaps were set at 60% on the final portion of the jump run. I turned the green light on to indicate to the skydivers it was safe to climb out. As jumpers climbed out of the aircraft; my speed was 80 KIAS and with the added drag of three jumpers climbing outside I observed the speed slow to 75KIAS. With all skydivers going out in one large group; an aft-CG situation was encountered. Two jumpers were seated aft of the door in a location where we ask them not to sit. Some of the remaining skydivers had moved further aft from their original seated positions.As I was about to push the power forward to accelerate; the airspeed indicator had an instantaneous decay of 8 KIAS. Less than a second later the left wing stalled and the aircraft entered into a one turn spin. I immediately executed spin-recovery procedures. I believe my aerobatic experience and upset prevention and recovery training was a large factor in a quick response and successful recovery. Speed and g-load limits were not exceeded for the aircraft configuration.
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.