# NTSB LAX91LA123: Beech B95, N2712Y, Riverside, CA, February 10, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: February 9, 1991, 18:14 local (Feb 10, 1991, 02:14 UTC)
- Place: Riverside, CA
- Coordinates: 33.989036, -117.43943 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.9890&lon=-117.4394&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report January 25, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27131
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX91LA123
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27131/pdf
- Page: https://openairdocs.org/ntsb/LAX91LA123

## Probable cause

FAILURE OF THE PILOT TO FOLLOW THE EMERGENCY GEAR EXTENSION PROCEDURE TO FULLY EXTEND THE LANDING GEAR.  CONTRIBUTING TO THE ACCIDENT WAS THE FAILURE OF THE PILOT TO MONITOR THE CONDITION OF THE ELECTRICAL POWER SYSTEM, LEADING TO THE COMPLETE LOSS OF ELECTRICAL POWER.

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - electrical system,circuit breaker - popped/tripped (contributing factor)
  - electrical system,battery - exhaustion (contributing factor)
  - procedures/directives - not followed, pilot in command (contributing factor)
- Forced landing, descent - emergency
  - emergency procedure - not followed, pilot in command (cause)
  - gear down and locked - not attained, pilot in command (contributing factor)
- Gear not extended, landing

## Analysis

THE CERTIFICATED COMMERCIAL PILOT AND TWO PASSENGERS WERE ENROUTE TO THEIR DESTINATION AIRPORT ON AN INSTRUMENT FLIGHT PLAN, WHEN A COMPLETE ELECTRICAL FAILURE OCCURRED.  THE PILOT FAILED TO NOTICE THAT BOTH AMMETERS WERE READING ZERO DUE TO THE FAILURE OF BOTH CURRENT LIMITERS IN THE CHARGING SYSTEM.  THE BATTERY WAS DEPLETED AND ALL ELECTRICAL POWER LOST.  THE PILOT ELECTED TO LAND BEFORE DARK AND FAILED TO FOLLOW THE EMERGENCY GEAR EXTENSION PROCEDURE TO FULLY EXTEND THE LANDING GEAR.  THE GEAR COLLAPSED UPON LANDING ON A TAXIWAY AT A MILITARY AIR FORCE BASE.

## Aircraft

- Registration: [N2712Y](https://openairdocs.org/aircraft/N2712Y), registered now, S/N TD-35, built 1958 (OpenAirDocs)
- Reported make and model: Beech B95
- Registry model: [Beech 95](https://openairdocs.org/model/beech-95) (registry code 1153402) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: TD-35
- Engines: LYCOMING O-360 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Joseph Sheble III
- Registered owner: Floyd Wolfe
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, February 1, 1991, 15 hours before
- Departed: HMT, HEMET, CA
- Destination: SNA, ORANGE COUNTY, CA
- Flight plan: IFR
- Airport: RIV, March Afb, runway 5, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 1,098 total, 80 in this make and model, 928 as pilot in command, 350 in the last 90 days, 150 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 270° at 6 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 68 °F, dew point 37 °F
- Altimeter: 29.00 inHg
- Observed at: RAL, 10 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 19910209004449A](https://openairdocs.org/incident/19910209004449A), Feb 9, 1991: Beech 95B55, Riverside, CA, Substantial damage. Electric power failure. Diverted,cranked gear down partially. Collapsed on landing. Current limiters failed.

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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