# NTSB LAX82FUM11: Cessna 172N, N739UY, San Clemente, CA, August 18, 1982

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Final report
- Date: August 17, 1982, 22:30 local (Aug 18, 1982, 05:30 UTC)
- Place: San Clemente, CA
- Location: 33.4491° N, 117.6131° W: Placed by OpenAirDocs: center of San Clemente, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.4491&lon=-117.6131&mi=10
- Phase of flight: [Unknown](https://openairdocs.org/ntsb-phases/990) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report August 17, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 72487
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX82FUM11
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/72487/pdf
- Page: https://openairdocs.org/ntsb/LAX82FUM11

## Sequence of events

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

- In flight collision with terrain/water, unknown
  - reason for occurrence undetermined (cause)

## Analysis

AIRCRAFT DECLARED MISSING BY WIFE OF PASSENGER. PARTS OF THE AIRCRAFT WERE FOUND BY BOATER AND BEACH WALKERS FROM 8/18 TO 8/25. INJURY INDEX PRESUMED.

## Aircraft

- Registration: [N739UY](https://openairdocs.org/deregistered/N739UY-2013-07-08), registration cancelled 2013-07-08, S/N 17270828, built 1978 (OpenAirDocs)
- Reported make and model: CESSNA 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17270828
- Airframe hours: 825
- Engines: LYCOMING O-320-N2AD 160 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: David Montgomery
- Registered owner: David Montgomery
- Departed: SAN DIEGO, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 70; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 1,177 total, 943 in this make and model

## Weather

- Conditions: Visual (VMC), Night/dark
- Visibility: 5 statute miles
- Temperature: 149 °F
- Altimeter: 29.00 inHg

## 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 19820817058079A](https://openairdocs.org/incident/19820817058079A), Aug 17, 1982: Cessna 172N, San Clemente, CA, Destroyed, 1 fatal. Wreckage indicates high impact crash into ocean. Main wreckage not recovered. Coastal fog in area. Practice flight.

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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