CEN09CA563

NTSB accident investigation · Halbert James H Rans S-7 · Short, OK · September 6, 2009

Accident · Minor injuriesData collectionFinal report
Date
September 6, 2009, 18:50 local (23:50 UTC)
Place
Short, OK
Injuries
2 minor
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N615JHHalbert James H Rans S-7
Defining event
Initial climb: Unknown or undetermined
Weather
Visual (VMC) · Day
Status
Completed · report December 29, 2009
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20090906016749A
Case key
74664

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

A partial loss of engine power for undetermined reasons.

Findings · 1

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Not determinedNot determined › Not determined · Unknown/Not determinedHalbert James H RANS S-7: 1 caseAll aircraft: 2,247 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The sport pilot was departing the 1,200 foot grass strip. He reported that the takeoff was normal until passing 250 feet above ground level. The engine began losing power without associated roughness or engine vibration. The pilot did not observe the gauges and focused on finding a suitable landing area. Since the airplane's flight path was toward slightly rising terrain, the pilot elected to turn the airplane toward a suitable landing area. During the turn, the airplane began losing altitude and the pilot performed a forced landing to an uncut hay field. Despite trying to keep the wings level, the left wing struck the hay first resulting in the airplane pivoting around the left wing tip. The airplane rotated 180 degrees before coming to rest in the upright position. A fire started near the lower portion of the engine and the passenger assisted with the pilot's egress prior to the airplane becoming engulfed in flames. Due to the remote location, the pilot reported that the fire response took 30 minutes. The pilot reported that the engine had operated normally prior to the accident flight without any indications of an impending failure. Thermal damage prevented a thorough investigation of the engine and the reason for the partial loss of engine power could not be determined.

Factual narrative

The sport pilot was departing the 1,200 foot grass strip. The pilot reported that the takeoff was normal until passing 250 feet above ground level when the airplane's engine began losing power without any associated roughness or engine vibration. The pilot did not observe the gauges and focused on finding a suitable landing area. Since the airplane's flight path was towards slightly rising terrain, the pilot elected to turn the airplane towards a suitable landing area. During the turn, the airplane began losing altitude and the pilot performed a forced landing to an uncut hay field. Despite trying to keep the wings level, the left wing struck the hay first resulting in the airplane pivoting around the left wing tip. The airplane rotated 180 degrees before coming to rest in the upright position. A fire started near the lower portion of the engine and the passenger assisted with the pilot's egress prior to the airplane becoming engulfed in flames. Due to the remote location, the pilot reported that the fire response took 30 minutes. The pilot reported that the engine had operated normally prior to the accident flight without any indications of an impending failure. Thermal damage prevented a thorough investigation of the engine and the reason for the partial loss of engine power could not be determined.

Aircraft

Registration
N615JH
Reported as
Halbert James H Rans S-7
Category
Airplane, amateur-built
Serial number
0695148
Airframe hours
562.6
Engine
Rotax 912, 80 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental light sport (Special)
Last inspection
Annual · June 17, 2009
Departed
Short, OK
Destination
Short, OK

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
74
Injuries
Minor
Certificate
Sport Pilot
Airplane ratings
Single-engine land
Medical
Sport pilot
Seat
Front
Flight hours
1,007 total · 61 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
86 °F, dew point 66 °F
Altimeter
30.01 inHg
Observed at
KFSM, 15 nm away

Docket · 1

The files NTSB released with the investigation on October 29, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 595 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.