FTW98LA348

NTSB accident investigation · Cessna 172N · Broomfield, CO · August 7, 1998

Accident · No injuriesLimited investigationFinal report
Date
August 7, 1998, 14:07 local (20:07 UTC)
Place
Broomfield, CO
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N118FPCessna 172N
Weather
Visual (VMC) · Day
Status
Completed · report February 15, 2001
Report
Approved by Office Director
FAA report
19980807037199A
Case key
43669

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 pilot's improper remedial action after making a hard landing and porpoising. A factor was his lack of total experience.

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.

Hard landingLanding - flare/touchdown
Porpoise/pilot-induced oscillation - encounteredPilot in command
Remedial action - improperPilot in commandCause
Lack of experiencePilot in commandFactor

Analysis

The recently certificated private pilot of 10 days was cleared to land on runway 11R. The wind was from 360 degrees at 5 knots. He used 20 degrees of flaps and an approach speed of 70 knots. The airplane landed hard and began to porpoise. The pilot said he 'could not keep the airplane on the ground so [he] applied forward pressure, this time hitting the nose gear.'

Factual narrative

On August 7, 1998, at 1407 mountain daylight time, a Cessna 172N, N118FP, operated by Wings of Denver and doing business as Airwest, Inc., was substantially damaged when it collided with terrain while landing at Broomfield, Colorado. The private pilot and two passengers were not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the personal flight operated under Title 14 CFR Part 91. The flight originated at Greeley, Colorado, approximately 1245.

According to the pilot's accident report, he was cleared to land on runway 11R. He used 20 degrees of flaps and an approach speed of 70 knots. The pilot wrote: "As I began to flare, I experienced a slight sinking more so than usual, possibly caused by wind so I applied more back pressure and when the sinking was at an acceptable rate right before touchdown, I let the nose back down again since things suddenly seemed to stabilize during my flare. As I let the nose down, the aircraft lightly came up again so I tried to put it down again thinking that my airspeed was to close to stall speed for a go around. I touched down hard I believe on the rear wheels and then could not keep the airplane on the ground so I applied forward pressure this time hitting the nose gear. An unusual sensation of an uncontrolled oscillation began to occur as sort of 'porpoising effect' but I finally managed to make a controlled landing."

According to the Jeffco METAR, the wind was from 360 degrees at 5 knots. The nose landing gear was bent aft, the firewall was buckled, the engine mounts were bent, and the lower cowling and fuselage skin were wrinkled. The pilot was able to taxi the airplane to the ramp.

The recently certificated private pilot received his license just 10 days before the accident.

Aircraft

Registration
N118FP
Reported as
Cessna 172N
Category
Airplane
Serial number
17271267
Airframe hours
4,340
Engine
Lycoming O-320-A2AD, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Wings Of Denver, doing business as Airwest, Inc.
Registered owner
Mark L. Robinson
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 11, 1998 · 31 hours before
Departed
GXY · Greeley, CO
Destination
BJC
Airport
BJC · Jeffco, runway 11R, 7,000 × 75 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
20
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
56 total · 5 in this make and model · 17 as pilot in command · 20 in the last 90 days · 9 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 5 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 54 °F
Altimeter
30.00 inHg
Observed at
BJC

FAA reports on this event · 1

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