PIPER PA-18
Enumclaw, WA — July 2, 2011
Event Information
| Date | July 2, 2011 |
| Event Type | ACC |
| NTSB Number | WPR11CA308 |
| Event ID | 20110624X33918 |
| Location | Enumclaw, WA |
| Country | USA |
| Coordinates | 47.01305, -121.53500 |
| Airport | Ranger Station |
| Highest Injury | MINR |
Aircraft
| Make | PIPER |
| Model | PA-18 |
| Category | AIR |
| FAR Part | 091 |
| Aircraft Damage | DEST |
Conditions
| Light Condition | DAYL |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 2 |
| None | 0 |
| Total Injured | 2 |
Event Location
Probable Cause
The pilot's failure to maintain an adequate airspeed during an encounter with a mountain wave and downdraft landing.
Full Narrative
The pilot reported that he was making an approach to an airstrip for a brief stop. He overflew the field and determined the wind was variable from the north and started his approach. On final he noticed an above average loss of altitude and speed due to a large mountain wave coming over the foothills to the west. He added power to compensate for the downdraft and continued on his landing approach. Once clear of some trees at the approach end of the runway he reduced the power to idle and was again pushed down by another downdraft. The pilot then added full power to arrest the airplane's decent but he did not have enough speed at that time to avoid a hard landing. The airplane slid off the runway and into a guard railing, which substantially damaged the fuselage tubular frame.
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.