CEN09LA325

NTSB accident investigation · Cessna 182 · Skiatook, OK · May 23, 2009

Accident · Minor injuriesLimited investigationFinal report
Date
May 23, 2009, 15:02 local (20:02 UTC)
Place
Skiatook, OK
Injuries
2 minor, 3 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4892DCessna 182
Defining event
Initial climb: Loss of engine power (partial)
Weather
Visual (VMC) · Day
Status
Completed · report October 19, 2009
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20090523012249A
Case key
73931

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

On this page

Probable cause

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 determinedCessna 182A: 9 casesAll 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 pilot stated that after departure and climbing to approximately 200 feet, the engine lost power and the airplane began to descend. During the forced landing the airplane struck a power line and impacted terrain resulting in substantial damage. An examination of the engine controls revealed no anomalies. The reason for loss of engine power could not be determined.

Factual narrative

On May 23, 2009, at 1502 central daylight time, a Cessna 182/A, N4892D, piloted by a private pilot, was substantially damaged when it impacted terrain near Skiatook, Oklahoma. Visual meteorological conditions prevailed at the time of the accident. The commercial flight was being conducted under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91 without a flight plan. The pilot and one passenger sustained minor injuries and three passengers were not injured. The local flight originated from Skiatook Municipal Airport (2F6), Skiatook, Oklahoma, approximately 1500. The private pilot was conducting the flight in the furtherance of a business and was in the process of taking skydivers aloft when the accident occurred. The pilot stated that after departure the airplane climbed to an altitude of approximately two hundred feet when the engine lost revolutions per minute (rpm) and the airplane began to descend. The pilot was unable to maintain altitude or "trouble-shoot" the problem due to his low altitude and selected a grass field to perform a forced landing. During the approach to the emergency landing the airplane struck a "horizontal power cable" and the airplane spun one hundred eighty degrees from its intended route of flight and impacted the terrain. Both airplane wing leading edges sustained impact damage from the power line and were bent aft approximately ten degrees. The nose gear separated at the firewall, the fuselage was wrinkled and bent to the right at the passenger compartment, and one motor mount was broken. An examination of the airplane engine, conducted by a Federal Aviation Administration (FAA) airworthiness inspector, established drive train continuity. An inspection of the magnetos for rotation and spark revealed no anomalies. An examination of the airplane fuel system revealed trace amounts of water in samples taken from the carburetor and sediment bowl, and traces of debris in the sediment bowl. Engine control continuity for throttle, mixture, propeller pitch control, and carburetor heat was established. The fuel mixture control was stiff to operate while the remaining controls operated smoothly. The propeller screen was clear of debris. An examination of engine maintenance records revealed that it had been 4,397 hours since the last overhaul and 4,316 hours since the last major over-haul. The recommended time between overhauls is 1,500 hours. In addition, the pilot's operating handbook for the Cessna 182 recommends an annual inspection and a complete inspection every 100 hours for aircraft that are operated commercially. Calculations of relevant meteorological data for the date, time, and location of the flight revealed a density altitude of 2,526 feet for the field elevation of 670 feet mean sea level (msl). Carburetor icing chart calculations show that the airplane was being operated in the light icing in glide or cruise power setting envelope. Data collected by the FAA inspector showed that the airplane was153 pounds over maximum gross weight and the center of gravity moment used by the pilot was incorrectly calculated. The actual calculated center of gravity (C.G.) for the airplane at the time of the accident was forward of the forward C.G. limit for this aircraft as published in the pilot’s operating handbook. According to the pilot's operating handbook for the Cessna 182, the normal climb performance chart, at maximum gross weight the airplane should have experienced a 670 foot per minute rate of climb on take-off.

Aircraft

Registration
N4892D
Reported as
Cessna 182 (A)
Category
Airplane
Serial number
34992
Airframe hours
4,316
Engine
Continental O470L, 235 horsepower, reciprocating
Damage
Substantial damage
Flight
Skydiving · Part 91
Operator
Lloyd Chapin, doing business as Skydive Airtight
Registered owner
Lloyd Chapin
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 17, 2009
Departed
2F6 · Skiatook, OK
Destination
2F6 · Skiatook, OK
Airport
2F6 · Skiatook Municipal Airport

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
52
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Last flight review
October 21, 2007
Seat
Left
Flight hours
363 total · 120 in this make and model · 336 as pilot in command · 123 in the last 90 days · 42 in the last 30 days · 7 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
86 °F, dew point 63 °F
Altimeter
29.95 inHg
Observed at
KTUL, 12 nm away

Docket · 2

The files NTSB released with the investigation on August 25, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 584 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.