CESSNA T210M
Cahokia, IL — August 25, 2011
Event Information
| Date | August 25, 2011 |
| Event Type | ACC |
| NTSB Number | CEN11CA640 |
| Event ID | 20110913X63156 |
| Location | Cahokia, IL |
| Country | USA |
| Coordinates | 38.57028, -90.15500 |
| Airport | St Louis Downtown Airport |
| Highest Injury | NONE |
Aircraft
| Make | CESSNA |
| Model | T210M |
| Category | AIR |
| FAR Part | 091 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | DAYL |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 0 |
| None | 1 |
| Total Injured | 0 |
Event Location
Probable Cause
A failure of a spring in the main landing gear actuation system that prevented the landing gear from extending.
Full Narrative
The pilot executed a wheel-up landing after normal and emergency extension procedures failed to properly lower the airplane's landing gear. The airplane sustained damage to the propeller, lower fuselage skins, and fuselage bulkheads. Postaccident retraction tests revealed that the landing gear extended and retracted abnormally. Examination of the landing gear system revealed a deformed spring on the up lock sequencing actuator. The spring was replaced and subsequent retraction tests were normal. Review of the hydraulic system for the airplane revealed that a failure of the up lock sequencing actuator could result in hydraulic pressure being directed to both sides of the main landing gear actuators causing the landing gear to not fully extend. No other preexisting anomalies were found.
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.