ASN Wikibase Occurrence # 357288
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| Date: | Thursday 6 June 1996 |
| Time: | 05:58 LT |
| Type: |  British Aerospace 3212 Jetstream 31 |
| Owner/operator: | Private |
| Registration: | N926AE |
| MSN: | 926 |
| Total airframe hrs: | 8464 hours |
| Engine model: | Garrett TPE-331-12WHR |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | San Luis Obispo, CA -
 United States of America
|
| Phase: | Take off |
| Nature: | Ferry/positioning |
| Departure airport: | (KSBP) |
| Kingman, AZ (KIGM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The first officer, who was 6 months past due for a proficiency check in the aircraft, was in the left seat for the ferry flight and applied power on takeoff. At 40 knots he transitioned from tiller to rudder steering while the captain was setting takeoff power. Moments later the crew felt the aircraft jerk to the left. The captain took the controls and brought both power levers back to flight idle and then into reverse. The captain attempted to control the aircraft but did not have access to the tiller from his position in the aircraft. Full application of rudder and differential braking could not bring the aircraft under control as it veered off the left side of the runway, then back to the right edge. Following the accident, the nose wheel steering, brakes, and propellers were functionally tested in accordance with the aircraft maintenance manuals, with no discrepancies noted. The FDR showed that the airspeed peaked at 58 knots. The rudder effectiveness increases incrementally from 40 knots IAS to full authority at 70 knots. A CVR tape sound spectrum analysis revealed that the left engine was in the start lock position during the takeoff. Normal procedure after engine start is to bring the props into reverse momentarily to bring them out of the start locks. There is no cockpit indicator for the position of the propellers relative to the start locks.
Probable Cause: The flight crew's loss of directional control resulting from an attempted takeoff with the left propeller on the start lock. Factors in the accident were: the lack of cockpit caution/warning system/lights available to verify that the propellers are out of the start locks; and the captain's location in the right seat without access to the nosewheel steering tiller.
Accident investigation:
 |
|
Sources:
NTSB LAX96FA228
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 16:15 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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