NYC96LA154

NTSB accident investigation · Cessna 172K · West Milford, NJ · July 22, 1996

Accident · No injuriesLimited investigationFinal report
Date
July 22, 1996, 18:30 local (22:30 UTC)
Place
West Milford, NJ
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N46700Cessna 172K
Weather
Visual (VMC) · Day
Status
Completed · report February 1, 1997
Report
Approved by Office Director
FAA report
19960722019559A
Case key
39221

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 failure in attaining the proper touchdown point, and his delay in initiating a go-around (aborted landing).

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 objectLanding - aborted
Object - tree(s)
Proper touchdown point - not obtainedPilot in commandCause
Raising of flaps - prematurePilot in commandCause

Analysis

An airline transport pilot, occuping the right front seat of the airplane, was performing takeoffs and landings to runway 24, with a passenger in the left front seat, and another passenger seated in the rear seat. The airplane landed long, with full flaps, and the pilot decided to abort the landing (go around). The pilot stated that the airplane failed to accelerate, and he retracted 'some' of the flaps. During the aborted landing, the airplane struck trees about 300 feet south of the runway. Examination of the airplane revealed no pre-impact failure of the engine, airframe or flight controls, and the flaps were at approximately 10 degrees. The pilot listed the runway length as 4,000 feet; however, the actual length was 2,734 feet. The Owner's Manual listed a ground roll landing distance of 520 feet for a maximum gross weight airplane under standard conditions, and total takeoff distance of 1,525 feet to clear a 50 foot obstacle.

Factual narrative

On July 22, 1996, at 1830 eastern daylight time, a Cessna 172K, N46700, was substantially damaged during an aborted landing and collision with trees at the Greenwood Lake Airport, West Milford, New Jersey. The certificated airline transport pilot and two passengers were not injured. Visual meteorological conditions prevailed for the personal flight that originated at the Greenwood Lake Airport, about 1810. No flight plan had been filed for the flight conducted under 14 CFR Part 91.

According to the pilot, he was practicing takeoffs and landings to runway 24. In the NTSB Form 6120.1/2 he stated:

"A decision was made to execute a go around/missed approach. Normal procedures were complied with. Aircraft failed to accelerate. In order to avoid high terrain dead ahead, a maneuver was executed to position the aircraft where it came to rest."

According to the Federal Aviation Administration (FAA) Inspector's report:

"...the aircraft...was laying...at the base of trees which were hit in the crash. It was located 100 yards south of Rwy 24. [The pilot]...told me he was practicing touch and go landings to Rwy 24 and his last landing was a little long. He had full flaps down and when he elected to go around, the aircraft would not accelerate. He [started] to take some flap up, but did not get them all up because he was getting into the trees. He could not understand why the airplane would not accelerate."

Examination of the airplane revealed no pre-impact failure of the engine, airframe or flight controls, and the flaps were at approximately 10 degrees.

Under balked landing, The Cessna Owner's Manual stated:

"In a balked landing (go-around) climb, reduce the wing flap setting to 20 degrees immediately after full power is applied. If the flaps were extended to 40 degrees, the reduction to 20 degrees may be approximated by placing the flap switch in the UP position for two seconds and then returning the switch to neutral. If obstacles must be cleared during the go-around climb, leave the wing flaps in the 10 to 20 degrees range and maintain a climb speed of 65 to 75 MPH until the obstacles are cleared.

The manual also stated, Under Wing Flap Settings, that the use of 10 degrees of flaps would shorten the ground run; however, the advantage was lost during the climb to clear a 50 foot obstacle. Under Take-Off Data in the manual, it listed a total takeoff distance of 1,525 feet, to clear a 50 foot obstacle, with the flaps retracted, at a 2,300 pound takeoff weight, at sea level and 59 degrees F. It also listed a ground roll landing distance of 520 feet for the same conditions.

The pilot listed the runway length in the NTSB Form 6120.1/2, as 4,000 feet. The actual runway length, as listed in several airport directories was 2,734 feet.

The pilot also listed the seat that he occupied during the accident as the right seat. The passenger listed in the front left seat, traditionally the pilot-in-command seat, obtained a student pilot certificate in August 1996.

Aircraft

Registration
N46700
Reported as
Cessna 172K
Category
Airplane
Serial number
17257436
Airframe hours
3,281
Engine
Lycoming O-320E2D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
T.R. Pegasus
Registered owner
Torree Air Inc.
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
100 hour · January 10, 1996 · 85 hours before
Departed
4N1
Airport
4N1 · Greenwood Lake, runway 24, 2,734 × 50 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
49
Certificates
Flight engineer, Commercial, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
13,000 total · 1,200 in this make and model · 3,000 as pilot in command · 20 in the last 90 days · 15 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 8 knots
Visibility
30 statute miles
Lowest ceiling
None
Temperature
77 °F, dew point 48 °F
Altimeter
29.00 inHg
Observed at
SWF, 26 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.