SEA99LA002

NTSB accident investigation · Cessna 172N · Buhl, ID · October 12, 1998

Accident · No injuriesLimited investigationFinal report
Date
October 12, 1998, 10:20 local (16:20 UTC)
Place
Buhl, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N6486JCessna 172N
Weather
Visual (VMC) · Day
Status
Completed · report February 15, 2001
Report
Approved by Office Director
FAA report
19981012028869A
Case key
45108

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 NTSB’s determination of the probable cause, and any contributing factors.

The pilot's failure to follow the aircraft's recommended balked landing procedure, resulting in a stall. Factors include the pilot's failure to maintain directional control during the landing flare, the pilot's lack of total experience, and insufficient altitude available for stall recovery.

Analysis

During the landing flare, the aircraft ballooned upward and the student pilot added power to regain control. The aircraft then drifted to the north side of the runway so the pilot elected to make a go-around. Full power was added and the flaps were raised from full (40 degrees) to zero. The stall warning horn sounded and the aircraft dropped, impacting terrain to the side of the runway. According to the Cessna 172N Pilot's Operating Handbook (POH), the aircraft's recommended balked landing procedure is to raise the flaps to 20 degrees, obtain a climb speed of 55 knots indicated airspeed (KIAS), raise flaps to 10 degrees until obstacles are cleared, and completely retract flaps at a safe altitude and 60 KIAS. The airplane's wings-level stall speed ranges from approximately 41 KIAS (47 knots calibrated airspeed [KCAS]) with full flaps to approximately 47 KIAS (53 KCAS) with flaps up. Maximum altitude loss during a stall recovery in the Cessna 172N may be as much as 180 feet. The student pilot, who received his initial solo endorsement 11 days before the accident, reported his total time as 14 hours.

Factual narrative

On October 12, 1998, approximately 1020 mountain daylight time, a Cessna 172N, N6486J, was substantially damaged when it impacted terrain during an attempted go-around at Buhl Municipal Airport, Buhl, Idaho. The aircraft is registered to Avcenter Inc. of Pocatello, Idaho, and was operated as a 14 CFR 91 instructional flight. The solo student pilot was uninjured in the accident. Visual meteorological conditions prevailed at the time, and there was no report of an ELT activation. The aircraft departed Twin Falls, Idaho (15 nautical miles east-southeast of Buhl) about 1 hour prior to the accident.

In his report submitted to the NTSB, the pilot said that he planned to make a touch and go on runway 09 (a 3,900 by 60 foot asphalt surface runway.) During the landing flare, the aircraft ballooned upward so he added power to regain control. The aircraft then drifted to the north side of the runway so the pilot decided to make a go-around. According to the pilot, "I applied full power and took the flaps from full [40 degrees] to zero." The pilot stated that the airplane then "started to drop" and the stall warning horn sounded. The aircraft subsequently impacted terrain on the north side of the runway. The student pilot reported winds at the time as being from 080 degrees at approximately 10 knots, and indicated on his NTSB accident report that no mechanical malfunction or failure was involved in the accident.

According to the Cessna 172N Pilot's Operating Handbook (POH), the aircraft's recommended balked landing procedure is to raise the flaps to 20 degrees, and obtain a climb speed of 55 KIAS. Flaps should then be raised to 10 degrees until obstacles are cleared, and completely retracted after a safe altitude and an airspeed of 60 KIAS. The aircraft's stall speed with 0 degrees bank, gross weight of 2,300 pounds and most forward center of gravity ranges from 41 knots indicated airspeed (KIAS) (47 knots calibrated airspeed [KCAS]) with full flaps, to 47 KIAS (53 KCAS) with flaps up. The POH states that maximum altitude loss during a stall recovery may be as much as 180 feet.

The student pilot received his initial solo endorsement on October 1, 1998, 11 days before the accident, and reported his total time as 14 hours.

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.

Loss of control - in flightGo-around (vfr)
Directional control - not maintainedPilot in commandFactor
Procedures/directives - not followedPilot in commandCause
Lack of total experiencePilot in commandFactor
Stall - encounteredPilot in command
In flight collision with terrain/waterDescent - uncontrolled
Altitude - not availableFactor

Aircraft

Registration
N6486J
Reported as
Cessna 172N
Category
Airplane
Serial number
17273877
Airframe hours
10,100
Engine
Lycoming O-320-H2AD, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Avcenter Inc.
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
100 hour · September 17, 1998 · 54 hours before
Departed
TWF · Twin Falls, ID
Airport
U03 · Buhl Municipal, runway 9, 3,900 × 60 ft, asphalt

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
35
Certificate
Student
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
14 total · 14 in this make and model · 2 as pilot in command · 14 in the last 90 days · 14 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
45 °F, dew point 30 °F
Altimeter
30.00 inHg
Observed at
TWF, 15 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 N6486J · 2

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