CEN10CA426

NTSB accident investigation · Grumman Acft ENG Cor-Schweizer G-164B · Alexandria, LA · July 22, 2010

Accident · No injuriesData collectionFinal report
Date
July 22, 2010, 15:30 local (20:30 UTC)
Place
Alexandria, LA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6772QGrumman Acft ENG Cor-Schweizer G-164B
Defining event
Maneuvering-low-alt flying: Loss of engine power (partial)
Weather
Visual (VMC) · Day
Status
Completed · report March 16, 2011
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20100722043549A
Case key
76731

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

The 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.

Power plantAircraft › Aircraft power plant · Not specifiedGrumman Acft ENG Cor-Schweizer G-164B: 2 casesAll aircraft: 198 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 pilot was performing an aerial application run when he observed smoke emanating from the engine. Immediately following the smoke, the engine experienced a partial loss of power. The pilot attempted to return to the airfield, but the airplane would not maintain altitude/airspeed. The pilot then elected to conduct a forced landing in the rice field. During the landing, the airplane rolled for 50-150 yards and nosed over, coming to rest inverted. A visual inspection of the engine failed to identify the reason for the loss of engine power. At the time of writing, the pilot had not returned a completed NTSB Form 6120.1, (The Pilot/Operator Aircraft Accident/Incident Report), as requested.

Factual narrative

The commercial rated pilot was performing an aerial application run when a “puff” of smoke came from the engine. Immediately after the puff of smoke, the engine lost power, but kept running. The pilot tried to return to the airfield, but the airplane would not maintain altitude/airspeed. The pilot then elected to conduct a forced landing in the rice field. During the landing, the airplane rolled for 50-150 yards before flipping over onto its back. The pilot was not injured; however, the airplane sustained substantial damage in the forced landing. A visual inspection of the engine failed to identify the reason for the loss of engine power. At the time this report was submitted, the pilot had not returned a completed NTSB Form 6120.1, (The Pilot/Operator Aircraft Accident/Incident Report), as requested.

Aircraft

Registration
N6772Q
Reported as
Grumman Acft ENG Cor-Schweizer G-164B
Category
Airplane
Serial number
281B
Engine
P & W PT6, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Vincent Flying Service
Registered owner
Vincent Flying Service
Airworthiness certificate
Special, Restricted (Special)
Departed
Alexandria, LA
Destination
Alexandria, LA
Flight plan
Unknown

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
37
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Seat
Single
Flight hours
8,000 total · 7,000 in this make and model · 300 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 73 °F
Altimeter
30.02 inHg
Observed at
KAEX, 7 nm away

Docket · 3

The files NTSB released with the investigation on October 5, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.3 MB 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.