19980519010309A

Accident · Substantial damage

FAA accident report · Stemme S10 · Plymouth, WI · May 19, 1998

Date
May 19, 1998 · 14:45 local
Place
Plymouth, WI
Phase of flight
Low Level Operations
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N97MT
NTSB investigation
NTSBCHI98LA171
Reported as
Stemme S10
Reported engine
LIMBAH L2400EB1
People aboard
2
Fatal injuries
0
Pilot’s flight hours
40 in the last 90 days

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.

Acft exper engine problems and made an emerg landing in a plowed field, fuselage broke behind the engine, (.4)at an altitude of 1000 feet above ground level (AGL) the pilot started the transition between soaring mode and powered flight mode. When completed the pilot observed that throttle movements did not produce power changes. The pilot said he picked a field for an off-airport landing and initiated a normal gliding approach to the field. Between 100 and 150 feet of the off-field landing site the pilot decided to turn into the wind, which was at a 45-degree crosswind, and the left wing tip contacted the ground in a 20-degree bank. The aircraft has a 75.5' wing span. Post accident investigation showed that there was usable fuel in both of the wing tanks. The engine and the drive train were undamaged from the accident. A test run of the engine showed that the engine started, without hesitation, and throttle response was determined to be normal. Engine controls and indications appeared to be in the normal operation limits. No other discrepancies were found. (-23) pilot shut down engine to "free glide". Had insufficent altitude to return to airport. Restart attempt of engine was unsuccessful. Picked an open field to land. On turn to final left wing struck ground causing glider to strike field hard. Fuselage of aircraft severed, extensive prop, nose & canopy damage. Minor wing tip damage.

As the FAA filed it

ACFT EXPER ENGINE PROBLEMS AND MADE AN EMERG LANDING IN A PLOWED FIELD, FUSELAGE BROKE BEHIND THE ENGINE, (.4)AT AN ALTITUDE OF 1000 FEET ABOVE GROUND LEVEL (AGL) THE PILOT STARTED THE TRANSITION BETWEEN SOARING MODE AND POWERED FLIGHT MODE. WHEN COMPLETED THE PILOT OBSERVED THAT THROTTLE MOVEMENTS DID NOT PRODUCE POWER CHANGES. THE PILOT SAID HE PICKED A FIELD FOR AN OFF-AIRPORT LANDING AND INITIATED A NORMAL GLIDING APPROACH TO THE FIELD. BETWEEN 100 AND 150 FEET OF THE OFF-FIELD LANDING SITE THE PILOT DECIDED TO TURN INTO THE WIND, WHICH WAS AT A 45-DEGREE CROSSWIND, AND THE LEFT WING TIP CONTACTED THE GROUND IN A 20-DEGREE BANK. THE AIRCRAFT HAS A 75.5' WING SPAN. POST ACCIDENT INVESTIGATION SHOWED THAT THERE WAS USABLE FUEL IN BOTH OF THE WING TANKS. THE ENGINE AND THE DRIVE TRAIN WERE UNDAMAGED FROM THE ACCIDENT. A TEST RUN OF THE ENGINE SHOWED THAT THE ENGINE STARTED, WITHOUT HESITATION, AND THROTTLE RESPONSE WAS DETERMINED TO BE NORMAL. ENGINE CONTROLS AND INDICATIONS APPEARED TO BE IN THE NORMAL OPERATION LIMITS. NO OTHER DISCREPANCIES WERE FOUND. (-23) PILOT SHUT DOWN ENGINE TO "FREE GLIDE". HAD INSUFFICENT ALTITUDE TO RETURN TO AIRPORT. RESTART ATTEMPT OF ENGINE WAS UNSUCCESSFUL. PICKED AN OPEN FIELD TO LAND. ON TURN TO FINAL LEFT WING STRUCK GROUND CAUSING GLIDER TO STRIKE FIELD HARD. FUSELAGE OF AIRCRAFT SEVERED, EXTENSIVE PROP, NOSE & CANOPY DAMAGE. MINOR WING TIP DAMAGE.

NTSB investigation

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