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NTSB Report
April 6, 2012 · Fisher HP-14 Sailplane · N990
Nampa, ID
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
April 6, 2012
Injury Outcomes
No injuries (1 uninjured)
Location
Nampa, ID
Aircraft
Fisher HP-14 Sailplane
Tail Number
N990
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR12CA157
The pilot reported that, after soaring for nearly 3 hours, he returned to the departure airport and made a traffic pattern approach for landing. On final approach, he lowered the wing flaps to 40 degrees. The pilot additionally reported that, because it appeared the glider was going to be too high, he further extended the wing flaps. Suddenly, the glider’s sink rate increased, and the glider touched down hard short of the runway. The glider bounced and yawed sideways, the landing gear collapsed, and the fuselage buckled as the glider slid to a stop. The pilot stated that he subsequently observed that the flaps were set to 90 degrees, which was 30 degrees beyond what he had intended.
NTSB Probable Cause
The pilot’s incorrect positioning of the wing flaps during the landing approach, which resulted in a loss of lift and hard landing.
Full Narrative
The pilot reported that after soaring for nearly 3 hours, he returned to the departure airport and made a traffic pattern approach for landing. On final approach, he lowered the wing flaps to 40 degrees. The pilot additionally reported that, because it appeared he was going to be too high, he further extended the wing flaps. Suddenly, the glider’s sink rate increased, and the glider touched down hard short of the runway. The glider bounced, yawed sideways, the landing gear collapsed, and the fuselage buckled as the glider slid to a stop. The pilot stated that he subsequently observed that the flaps were set to 90 degrees, which was 30 degrees farther down than he had intended.
Flight
Event TypeAccident
Event Time15:52 PDT
Nearest AirportNampa Municipal (0nm)
Runway29
Runway Length5000 ft
Runway Width75 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftFisher HP-14 Sailplane
Tail NumberN990
Aircraft CategoryGli
DamageSubstantial
Operating RulePart 91
Engines0
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 72 · Third Class · None
Conditions
ConditionsVMC
LightDaylight
Wind310° @ 11 kt, gusting 17 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point48 / 18 C
Altimeter29.92 inHg
Weather SourcePILO