# NTSB LAX92LA296: Grumman AA5, N28410, Soledad, CA, July 11, 1992

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 10, 1992, 20:15 local (Jul 11, 1992, 03:15 UTC)
- Place: Soledad, CA
- Coordinates: 36.389266, -121.29927 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.3893&lon=-121.2993&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report September 28, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27685
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX92LA296
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27685/pdf
- Page: https://openairdocs.org/ntsb/LAX92LA296

## Probable cause

THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS AND THE LACK OF SUITABLE TERRAIN FOR A FORCED LANDING.

## Sequence of events

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

- Loss of engine power, landing
  - precautionary landing - initiated, pilot in command
  - engine instruments,oil pressure gage - pressure too low
  - reason for occurrence undetermined (cause)
- In flight collision with object, landing
  - object - tree(s)
- Hard landing, landing - flare/touchdown
  - terrain condition - none suitable (cause)
- Gear collapsed, landing - flare/touchdown
  - landing gear - overload

## Analysis

AFTER APPROXIMATELY ONE HOUR AND FIFTEEN MINUTES INTO A CROSS COUNTRY FLIGHT THE PILOT OBSERVED THE ENGINE OIL PRESSURE DECREASING. HE ELECTED TO MAKE A PRECAUTIONARY LANDING ON A HIGHWAY.  WHEN THE AIRCRAFT TURNED ONTO THE FINAL APPROACH THE ENGINE LOST POWER AND THE AIRCRAFT'S RIGHT WING COLLIDED WITH A TREE. THE AIRCRAFT THEN STRUCK THE ROAD IN A NOSE-DOWN ATTITUDE, COLLAPSING THE NOSE AND LEFT MAIN LANDING GEARS. EXAMINATION OF THE ENGINE FAILED TO DISCLOSE ANY PREEXISTING MALFUNCTIONS OR FAILURES.

## Aircraft

- Registration: [N28410](https://openairdocs.org/deregistered/N28410-1998-12-16), registration cancelled 1998-12-16, S/N AA5B0801 (OpenAirDocs)
- Reported make and model: GRUMMAN AA5
- Registry model: [Gulfstream American AA-5B](https://openairdocs.org/model/gulfstream-american-aa-5b) (registry code 3970106) (OpenAirDocs)
- Category: Airplane
- Serial number: 0801
- Airframe hours: 1664
- Engines: LYCOMING O-360-A4K 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Advanced Aero Dynamics & Struc
- Registered owner: Advanced Aero Dynamics & Struc
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 1, 1992, 30 hours before
- Departed: BUR, BURBANK, CA
- Destination: SJC, SAN JOSE, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 321 total, 5 in this make and model, 256 as pilot in command, 5 in the last 90 days, 2 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 100° at 10 knots
- Lowest ceiling: none
- Temperature: 70 °F, dew point 55 °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 19920710027549A](https://openairdocs.org/incident/19920710027549A), Jul 10, 1992: Gulstm AA5A, Soledad, CA, Substantial damage. Reported rough engine low oil pressure prompted landing on road. Struck a tree. No defects found. Cause unknown.

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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