ANC97LA010

NTSB accident investigation · Cessna 172M · Bethel, AK · December 4, 1996

Accident · No injuriesLimited investigationFinal report
Date
December 4, 1996, 09:54 local (13:54 UTC)
Place
Bethel, AK
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N20024Cessna 172M
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 1998
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19961204037099A
Case key
2953

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

the pilot's improper planning/decision, and resultant failure to obtain/maintain sufficient airspeed during takeoff. A factor related the accident was: taking off with a tailwind.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with terrain/waterTakeoff
Planning/decision - improperPilot in commandCause
Weather condition - tailwindFactor
Airspeed - not obtained/maintainedPilot in commandCause
Stall/mush - inadvertentPilot in commandCause

Analysis

The pilot and two passengers were departing on a cross-country on-demand charter flight. The airplane was 120 pounds below maximum gross weight. The pilot departed runway 11, but after lift off, the airplane would not climb. The airplane collided with snow covered tundra terrain about 1/8 mile from the departure end of the runway. The operator indicated the pilot and a mechanic passenger observed the airplane lights flicker on and off, and smelled an odor of overheated electrical wiring. An inspection of the airplane by the FAA did not reveal any mechanical malfunction. The wind conditions at the airport, from just before and just after the accident, varied from 300 to 312 degrees at 9 knots.

Factual narrative

On December 4, 1996, at 0954 Alaska standard time, a wheel equipped Cessna 172M, N20024, collided with terrain during takeoff from the Bethel Airport, Bethel, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country on-demand passenger flight to Napaskiak, Alaska, under Title 14 CFR Part 135 when the accident occurred. The airplane, registered to Village Aviation Inc., Bethel, and operated by Camai Air as flight number 24, sustained substantial damage. The certificated commercial pilot, and 2 passengers were not injured. Visual meteorological conditions prevailed. VFR company flight following procedures were in effect.

The operator reported that the airplane departed runway 11. The airplane lifted off the ground but would not climb. The airplane collided with snow covered tundra terrain about 1/8 mile from the departure end of the runway. The airplane received damage to the landing gear, fuselage, and right wing. The operator indicated that the pilot and a mechanic passenger observed the airplane lights flicker on and off and smelled an odor of overheated electrical wiring.

A Federal Aviation Administration (FAA) inspector examined the airplane at the accident site. No mechanical malfunction was noted. The FAA inspector reported the airplane was 120 pounds under maximum gross weight. The FAA also indicated the pilot reported rotating the airplane for takeoff at 60 to 65 MPH.

The closest official weather observation station is Bethel, Alaska. At 0952, an aviation routine weather report (METAR) was reporting in part: Wind, 330 degrees (true) at 9 knots; visibility, 10 miles; sky condition and ceiling, few clouds at 5,000 feet, few clouds at 20,000 feet; temperature, -4 degrees F; dew point, -10 degrees F; altimeter, 29.10 inHg.

At 1006, a special observation was reporting in part: Wind, 320 degrees (true) at 9 knots; visibility, 20 miles; sky condition and ceiling, few clouds at 5,000 feet, few clouds at 20,000 feet; temperature, -4 degrees F; dew point, -10 degrees F; altimeter, 29.10 inHg; remarks, aircraft mishap.

At 0953, the automatic terminal information service (ATIS) for the Bethel airport was reporting, in part: "Bethel Tower information foxtrot, at 0854; wind, 300 at 9 knots; visibility, 10 miles; sky condition and ceiling, few clouds at 5,000 feet; temperature, -20 C; dew point temperature, -24 C; altimeter, 29.08 inHg..."

Aircraft

Registration
N20024
Reported as
Cessna 172M
Category
Airplane
Serial number
17260940
Airframe hours
12,764
Engine
Lycoming O-320-E2D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Village Aviation
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · November 4, 1996 · 81 hours before
Departed
BET
Destination
PKA · Napaskiak, AK
Flight plan
Company VFR
Airport
BET · Bethel, runway 11, 1,850 × 75 ft, gravel

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
39
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,200 total · 400 in this make and model · 1,180 as pilot in command · 170 in the last 90 days · 100 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
330° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
-4 °F, dew point -0 °F
Altimeter
29.00 inHg
Observed at
BET, 1 nm away

FAA reports on this event · 1

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

Other investigations on N20024 · 1

Matched to the same aircraft by N-number and date.