DEN07CA118

NTSB accident investigation · Johnson F11C-2PJ · Deming, NM · July 11, 2007

Accident · Minor injuriesData collectionFinal report
Date
July 11, 2007, 08:15 local (14:15 UTC)
Place
Deming, NM
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N442PJJohnson F11C-2PJ
Weather
Visual (VMC) · Day
Status
Completed · report August 30, 2007
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20070711014959A
Case key
66218

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

Total failure of the top engine mount bolts and subsequent engine separation from the airframe.

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.

Airframe/component/system failure/malfunctionLanding - flare/touchdown
Engine installation,mounting bolt - failure,totalCause
Engine assembly - separationCause
Nose overLanding - roll

Analysis

According to the pilot's accident report, he had made a conventional 3-point landing. The airplane had rolled about 75 to 100 feet when the "engine sagged from the right front and rolled underneath [the airplane]." The pilot thought he had run over something on the runway, but he had actually "bounced over the engine." The airplane nosed over and slid to a stop. The upper wing, fuselage, and vertical stabilizer were crushed. The pilot said the two top bolts and welds on the homemade engine mount broke and the engine separated from the airframe because it had not been "adjusted for the weight of the Jacobs engine." The airplane had accumulated 16 hours of a 40-hour test phase.

Factual narrative

The pilot said he had made a conventional 3-point landing. The airplane had rolled about 75 to 100 feet when the "engine sagged from the right front and rolled underneath [the airplane]." The pilot thought he had run over something on the runway, but he had actually "bounced over the engine." The airplane nosed over and slid to a stop. The pilot said the two top bolts and welds on the homemade engine mount had broken and the engine separated from the airframe because it had not been "adjusted for the weight of the Jacobs engine." The airplane had accumulated 16 hours of a 40-hour test phase.

Aircraft

Registration
N442PJ
Reported as
Johnson F11C-2PJ
Category
Airplane, amateur-built
Serial number
001
Airframe hours
16
Engine
Jacobs UNK, 330 horsepower, reciprocating
Damage
Substantial damage
Flight
Flight test · Part 91
Registered owner
Paul E. Johnson
Airworthiness certificate
Special, Experimental (Special)
Departed
NONE · Deming, NM
Destination
NONE · Deming, NM

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
53
Injuries
Minor
Certificate
Airline transport
Airplane ratings
Single-engine sea, Multi-engine land, Single-engine land, Multi-engine sea
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
November 1, 2006
Seat
Rear
Flight hours
10,400 total · 20 in this make and model · 36 in the last 90 days · 22 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 61 °F
Altimeter
30.19 inHg
Observed at
DMN

FAA reports on this event · 1

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