20020929028309A

Accident · Substantial damage

FAA accident report · Swrngn SA227-AC · Hawthorne, CA · September 29, 2002

Date
September 29, 2002 · 09:13 local
Place
Hawthorne, CA
Airport
Hawthorne Municipal Airport
Operating rules
Air taxi and commuter (Part 135)
Operator
C9UA
Damage
Substantial damage
Aircraft
N343AE
NTSB investigation
NTSBLAX02FA300
Reported as
Swrngn SA227AC
Fatal injuries
0

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) Investigation of the accident scene and aircraft revealed that the aircraft veered left after nose wheel steering was disengaged. The left engine propeller was found to be on the start lock at the time of impact. The right engine propeller was not on the start locks and appeared to be in reverse pitch which is consistent with the position of the cockpit controls. The nose wheel steering actuator was found with the right hydraulic line separated from the end cap. This was determined to be caused by contact with the actuator piston which overtravelled when the nose gear impacted a runway sign after the aircraft left the runway surface. Maintenance records show no previous or current discrepencies for the propellers or any component in the directional control system. (-23 amendment) after further investigation, a conclusion cannot be made, that the left engine propeller was on the start lock when takeoff was commenced, or that a nose wheel steering malfunction was not present.

As the FAA filed it

(-23) INVESTIGATION OF THE ACCIDENT SCENE AND AIRCRAFT REVEALED THAT THE AIRCRAFT VEERED LEFT AFTER NOSE WHEEL STEERING WAS DISENGAGED. THE LEFT ENGINE PROPELLER WAS FOUND TO BE ON THE START LOCK AT THE TIME OF IMPACT. THE RIGHT ENGINE PROPELLER WAS NOT ON THE START LOCKS AND APPEARED TO BE IN REVERSE PITCH WHICH IS CONSISTENT WITH THE POSITION OF THE COCKPIT CONTROLS. THE NOSE WHEEL STEERING ACTUATOR WAS FOUND WITH THE RIGHT HYDRAULIC LINE SEPARATED FROM THE END CAP. THIS WAS DETERMINED TO BE CAUSED BY CONTACT WITH THE ACTUATOR PISTON WHICH OVERTRAVELLED WHEN THE NOSE GEAR IMPACTED A RUNWAY SIGN AFTER THE AIRCRAFT LEFT THE RUNWAY SURFACE. MAINTENANCE RECORDS SHOW NO PREVIOUS OR CURRENT DISCREPENCIES FOR THE PROPELLERS OR ANY COMPONENT IN THE DIRECTIONAL CONTROL SYSTEM. (-23 AMENDMENT) AFTER FURTHER INVESTIGATION, A CONCLUSION CANNOT BE MADE, THAT THE LEFT ENGINE PROPELLER WAS ON THE START LOCK WHEN TAKEOFF WAS COMMENCED, OR THAT A NOSE WHEEL STEERING MALFUNCTION WAS NOT PRESENT.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

Other reports on N343AE · 2

Matched to the same aircraft by N-number and date.