Aviation Crash Map

Cessna 421B N11BU

3 July 1992 · Hayward, California, United States · No injuries

Summary

On 3 July 1992 at about 00:45 local time, a Cessna 421B registered N11BU, operated by Professional Pilot Associates, was involved in an accident near Hayward, California, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

The record

Date
at 00:45
Classification
Accident
Location
Hayward, California, United States
Nearest airport
Hayward (HWD)
Coordinates
37.6698, -122.0793
Aircraft
Cessna 421B
Registration
N11BU
Category
Airplane
Engines
2
Operator
Professional Pilot Associates
Operating rule
Part 91: General Aviation
Purpose of flight
Positioning
Phase of flight
Not recorded
Route
Unknown → Oakland
Aircraft damage
Substantial
Weather
VMC
Light
Day
NTSB number
LAX92LA276

People

Nobody was injured.

On board Died Serious Minor Uninjured
1 0 0 0 1

Probable cause

THE EXPLOSION OF FUEL VAPORS IN THE RIGHT WING DUE TO THE PILOT'S OVERPRIMING OF THE RIGHT ENGINE DURING A START ATTEMPT AND AN UNCORRECTED PREEXISTING FUEL SYSTEM LEAK. A FACTOR IN THE ACCIDENT WAS INADEQUATE MAINTENANCE PERFORMED ON THE AIRCRAFT.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

THE PILOT REPORTED THAT HE OVERPRIMED THE RIGHT ENGINE WHEN HE ATTEMPTED TO START IT. DURING THE START OPERATION, AN ACCUMULATION OF FUEL VAPOR LOCATED OUTBOARD OF THE RIGHT ENGINE EXPLODED AND RIPPED OPEN A YARD LONG PORTION OF THE RIGHT WING'S UPPER SKIN PANELS. EVIDENCE WAS OBSERVED OF AN UNCORRECTED PREEXISTING FUEL LEAK IN THE VICINITY OF THE RIGHT ENGINE'S AUXILIARY FUEL PUMP. THE PILOT REPORTED THAT HE WAS AN A & P MECHANIC, AND HE OWNED, OPERATED AND MAINTAINED THE AIRPLANE.

Quoted verbatim from the NTSB record.

Other Cessna 421 accidents

Date Aircraft Location Operator Outcome Died
22 Nov 1992 Cessna 421C
N52AK
Santa Maria, California, United States Farroll Equipment Compnany Serious injuries -
5 Jan 1992 Cessna 421C
N2654M
Mammoth Lakes, California, United States Frank Gearhart Fatal 4
5 Jul 1992 Cessna 421B
N929DB
Shelter Cove, California, United States Dana L. Brenneman Serious injuries -
24 Jun 1992 Cessna 421B
N628RJ
Monterey, California, United States Judith REA Enterprises Fatal 3
13 Jan 1992 Cessna 421C
N40JK
Atlantic Ocean
no coordinates
Williamson, J. M. Fatal 5
22 Jun 1992 Cessna 421B
N39PW
Columbus, Ohio, United States Shoeware Limited No injuries -

All 507 records for this type

Other accidents in this area

Date Aircraft Location Operator Outcome Died
22 Feb 1992 Piper PA-28R-201T
N9343C
Ludlow, California, United States Higgins, Melvin W & Jean Minor injuries -
22 Feb 1992 Beechcraft C-23
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Fullerton, California, United States
no coordinates
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23 Feb 1992 Cessna 150
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23 Feb 1992 Cessna 182N
N8948G
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25 Feb 1992 Grumman G-164B
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25 Feb 1992 Bellanca 7ECA
N4193Y
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All 170,864 records in United States