# NTSB LAX88DUM01: Durbin Monnett Moni, N190PJ, Ramona, CA, November 1, 1987

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: November 1, 1987, 11:00 local (19:00 UTC)
- Place: Ramona, CA
- Coordinates: 33.069702, -116.829216 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.0697&lon=-116.8292&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report March 31, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 25729
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX88DUM01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25729/pdf
- Page: https://openairdocs.org/ntsb/LAX88DUM01

## Sequence of events

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

- Loss of engine power, takeoff - initial climb
  - reason for occurrence undetermined (cause)
- Forced landing, maneuvering - turn to landing area (emergency)
- Loss of control - in flight, maneuvering - turn to landing area (emergency)
  - flight/nav instruments,airspeed indicator - inoperative (contributing factor)
  - maintenance - improper, pilot in command (contributing factor)
  - airspeed - not maintained, pilot in command (cause)
  - stall/spin - inadvertent, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

ACQUAINTANCES OF THE PLT RPRTD HE HAD PERFORMED MAINTENANCE TO REPAIR AN INOPERATIVE AIRSPEED INDICATOR. HE THEN TOOK OFF ON A TEST FLT. A WITNESS, WHO WAS A PLT, RPRTD THE ENG STARTED TO 'CUT OUT' AT ABOUT 200 TO 300 FT AGL, THE TAIL 'WAGGLED A COUPLE OF TIMES' & THEN THE ACFT ENTERED A SPIN & CRASHED IN A NOSE DOWN ATTITUDE. TWO OTHER WITNESSES RPRTD THERE WAS AN INTERRUPTION OF POWER BEFORE THE ACFT CRASHED. HOWEVER, THE ENG & FORWARD PART OF THE FUSELAGE WERE BADLY DAMAGED & NO REASON WAS FOUND FOR A POWER LOSS. AN EXAM OF THE AIRSPEED INDICATOR REVEALED IT HAD RUPTURED & HAD BEEN EPOXIED, BUT THE RUPTURE CONTINUED BEYOND THE EPOXY. THE PLT HAD A STUDENT CERTIFICATE. HE HAD 332 HRS OF FLT TIME IN ULTRALIGHTS, BUT HAD LOGGED ONLY 3 HRS OF DUAL FLT TIME IN POWERED ACFT & HAD ONLY 2.3 HRS IN THIS MAKE & MODEL.

## Aircraft

- Registration: [N190PJ](https://openairdocs.org/deregistered/N190PJ-2013-06-12), registration cancelled 2013-06-12, S/N 190, built 1984 (OpenAirDocs)
- Reported make and model: DURBIN MONNETT MONI (MONNETT MO)
- Registry model: [Durbin John R MONNETT MONI](https://openairdocs.org/model/durbin-john-r-monnett-moni) (registry code 056592N) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Glider, amateur-built
- Serial number: 190
- Airframe hours: 110
- Engines: KFM 107 23 horsepower reciprocating
- Damage: Destroyed
- Flight: Part 91
- Operator: Lipner, Robert M.
- Registered owner: Robert M Lipner
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, March 22, 1987, 14 hours before
- Departed: L39
- Airport: L39, Ramona, runway 9, 4,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; student; medical: class 3, valid medical--w/ waivers/lim; seat: front; flight hours: 344 total, 3 in this make and model, 326 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 150° at 7 knots
- Visibility: 25 statute miles
- Lowest ceiling: none
- Temperature: 72 °F
- Observed at: SEE, 13 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 (OpenAirDocs).

- [Accident 19871101061839A](https://openairdocs.org/incident/19871101061839A), Nov 1, 1987: Amtr MONI, Ramona, CA, Destroyed. Stalled after takeoff. Spun straight into the ground. Airspeed indicator was inoperative. No solo endorsement.

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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