# NTSB DEN07CA118: Johnson F11C-2PJ, N442PJ, Deming, NM, July 11, 2007

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Data collection · Final report
- Date: July 11, 2007, 08:15 local (14:15 UTC)
- Place: Deming, NM
- Coordinates: 32.270278, -107.723052
- Nearby events: https://openairdocs.org/map.md?lat=32.2703&lon=-107.7231&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report August 30, 2007
- Report: Approved by Office Director
- Parties: FAA Flight Standards District Office
- NTSB case key (mKey): 66218
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN07CA118
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/66218/pdf
- Page: https://openairdocs.org/ntsb/DEN07CA118

## Probable cause

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

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, landing - flare/touchdown
  - engine installation,mounting bolt - failure,total (cause)
  - engine assembly - separation (cause)
- Nose over, landing - 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](https://openairdocs.org/deregistered/N442PJ-2009-01-13), registration cancelled 2009-01-13, S/N 001, built 2005 (OpenAirDocs)
- Reported make and model: Johnson F11C-2PJ
- Registry model: [Johnson Paul F11C-2PJ](https://openairdocs.org/model/johnson-paul-f11c-2pj) (registry code 05620R5) (OpenAirDocs)
- Registry engine: [Jacobs L-6MB](https://openairdocs.org/engine/jacobs-l-6mb) (registry code 35014, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 001
- Airframe hours: 16
- Engines: 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

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; injuries: minor; 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 (OpenAirDocs).

- [Accident 20070711014959A](https://openairdocs.org/incident/20070711014959A), Jul 11, 2007: Amtr F11C2PJ, Deming, NM, Substantial damage. (-23) On July 11, 2007 at 0825 MDT a paul johnson F11C-2PJ, an amateur built aircraft, flipped upside down after landing at a private air strip east of Deming,…

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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