Concord Airport
Aircraft Accident/Incident Report

Concord, California 94520
Thursday, August 9, 1990 13:05 PDT

NTSB Narrative Summary Released at Completion of Accident

SHORTLY AFTER DEPARTING CONCORD AIRPORT THE PILOT EXPERIENCED AN INTERMITTENT ELECTRICAL FAILURE FOLLOWED BY A TOTAL ELECTRICAL FAILURE. DURING THE INTERMITTENT PHASE THE PILOT ELECTRICALLY EXTENDED THE LANDING GEAR. DURING THE EXTENSION THE AIRPLANE SUSTAINED A TOTAL ELECTRICAL FAILURE. THE PILOT RETURNED TO CONCORD AIRPORT AND LANDED. UPON TOUCHDOWN THE MAIN LANDING GEAR COLLAPSED. AFTER THE AIRPLANE CAME TO REST THE PILOT SHUT OFF ALL ELECTRICAL SWITCHES, INCLUDING THE BATTERY/MASTER SWITCH. THE PILOT STATED THAT HE THOUGHT THE LANDING EXTENDED TO THE LOCKED POSITION BEFORE SUSTAINING THE TOTAL ELECTRICAL FAILURE AND WAS UNABLE TO CHECK THE LANDING GEAR WARNING LIGHTS TO DETERMINE THAT THE LANDING GEARS WERE DOWN AND LOCKED. THE PILOT DID NOT FOLLOW THE APPROPRIATE CHECKLIST AND USE THE HANDCRANK TO DETERMINE THAT THE LANDING GEAR WAS IN FACT EXTENDED AND LOCKED.

NTSB Probable Cause Narrative

THE PILOT'S FAILURE TO FOLLOW THE ELECTRICAL SYSTEM FAILURE CHECKLIST. CONTRIBUTING TO THIS ACCIDENT WAS THE TOTAL ELECTRICAL FAILURE FOR UNDETERMINED REASONS AND THE LANDING GEAR BEING UNLOCKED.

Event Information

Type of Event Accident
Event Date 8/9/1990
Event Day of the Week Thursday
Time of Event 1305
Event Time Zone Pacific Daylight Time
Event City CONCORD
Event State CALIFORNIA
Event Country --
Zipcode of the event site 94520
Event Date Year 1990
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport CONCORD
Event Location Nearest Airport ID CCR
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles 0
Degrees magnetic from airport 0
Airport Elevation 23
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1305 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID CCR
Elevation of weather observation facility 23
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 12000
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 15
Air Temperature at event time (in degrees celsius) -18
Dew Point at event time (in degress fahrenheit) -18
Wind Direction (degrees magnetic) 350
Variable Wind Indicator Unknown
Wind Speed (knots) 10
Wind Velocity Indicator Unknown
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) 0
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 1716
NTSB Notification Source --
NTSB Notification Date --
NTSB Notification Time 0
Fiche Number and/or location -used to find docket information 43207
Date of most recent change to record Dec 18 2002 11:28AM
User who most recently changed record NTSB\GIUV
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N76SH
NTSB Number LAX90LA288
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name CESSNA
Aircraft Model 421
Aircraft Series Identifier 421
Aircraft Serial Number 0558
Certified Max Gross Weight 7450
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 6
Number of Engines 2
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Unknown
Date of Last Inspection --
Airframe hours since last inspection 0
Airframe Hours --
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name CALWEST AVIAITON
Aircraft Owner Street Address 81 JOHN GLENN DR.
Aircraft Owner City CONCORD
Aircraft Owner State CA
Aircraft Owner Country
Aircraft Owner Zipcode 94520
Operator is an individual? --
Operator Name
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address
Operator City
Operator State
Operator Country
Operator Zip code
Operator Code
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Business
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code
Departure City
Departure State
Departure Country
Departure Time 1215
Departure Time Zone PDT
Destination Same as Local Flt --
Destination Airport Code MRY
Destination City MONTEREY
Destination State CA
Destination Country
Specific Phase of Flight Climb
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:35AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 32R
Runway Length 3951
Runway Width 150
Sight Seeing flight No
Air Medical Flight No
Medical Flight --