LAX89FA082

NTSB accident investigation · Beech 35-B33 · Ripon, CA · January 10, 1989

Accident · FatalField investigationFinal report
Date
January 10, 1989, 10:12 local (18:12 UTC)
Place
Ripon, CA
Injuries
3 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N8974MBeech 35-B33
Weather
Instrument (IMC) · Day
Status
Completed · report September 5, 1990
Report
Approved by Office Director
FAA report
19890110000379A
Case key
26201

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

Continued flight by the pilot into known icing conditions and structural (wing) icing, which subsequently resulted in an uncontrolled stall. A contributing factor was the icing condition.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherCruise - normal
Weather condition - icing conditionsFactor
Flight into known adverse weather - initiatedPilot in commandCause
Wing - iceCause
Loss of control - in flightCruise
Stall - uncontrolled
In flight collision with terrain/waterDescent - uncontrolled

Analysis

Before takeoff, the plt rcvd a wx briefing for the proposed route of flt. This included info about the freezing lvl (forecast at 5000 ft) & a precaution for moderate icing conds. The briefing did not include SIGMET lima 1 info about moderate to severe icing conds, but the sigment was not valid for the plt's proposed route of flt. However, the plt rcvd clnc for an amended route of flt, which went thru the edge of an area defined by SIGMET lima 1. Shortly after leveling at 11,000', the plt rprtd the acft was in icing conds & would not maintain altitude. As the ARTCC controller was coordinating with TRACON for a lower altitude, the plt rprtd the acft was stalling. Shortly thereafter, it crashed in a right wing down, nose low attitude & burned. The acft was not equipped for flt in known icing conds.

Aircraft

Registration
N8974M
Reported as
Beech 35-B33
Category
Airplane
Serial number
CD-728
Airframe hours
3,223
Engine
Continental IO-520-BA, 285 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Business · Part 91
Operator
Richard Enterprises, Inc.
Registered owner
Richard Enterprises Inc
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 4, 1987 · 168 hours before
Departed
HWD · Hayward, CA
Destination
EMT · El Monte, CA
Flight plan
IFR

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
49
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Toxicology
Performed
Flight hours
673 total · 8 in this make and model · 640 as pilot in command

Weather

Conditions
Instrument (IMC) · Day
Wind
Calm
Visibility
1 statute miles
Lowest ceiling
500 ft overcast
Temperature
45 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.