NTSB Identification: CHI86LA208.
The docket is stored on NTSB microfiche number 32253.
Accident occurred Sunday, August 17, 1986 in IONIA, MI
Aircraft: SCHLEICHER ASW-20, registration: N12GH
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

ACCORDING TO THE PLT, AT APPROXIMATELY 20 MILES SOUTH OF IONIA COUNTY AIRPORT, IONIA, MICHIGAN, HE USED FRONTAL ZONE LIFT TO CLIMB TO 4600 MSL (3800 AGL), AND HE ENCOUNTERED NO FURTHER LIFT. THE PLT STATED THAT HE ANTICIPATED AN INCREASE IN WIND GRADIENT DURING DESCENT AND WHILE ON A ONE MILE FINAL HE STILL HAD VISUAL CONFIDENCE IN MAKING THE AIRPORT. ACCORDING TO THE PLT, HE THEN EXPERIENCED SEVERE SINK AND STRUCK A BUSH AND A LARGE ROCK BEFORE COMING TO REST APPROXIMATELY 1/4 MILE SHORT OF RWY 36 AT IONIA COUNTY AIRPORT.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

IN-FLIGHT PLANNING/DECISION..INADEQUATE..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

PLANNED APPROACH..INACCURATE..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

DISTANCE..MISJUDGED..PILOT IN COMMAND

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