DEN89LA095

NTSB accident investigation · Beech F33A · Lamar, CO · March 27, 1989

Accident · No injuriesLimited investigationFinal report
Date
March 27, 1989, 11:20 local (18:20 UTC)
Place
Lamar, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N3042ZBeech F33A
Weather
Visual (VMC) · Day
Status
Completed · report April 24, 1990
Report
Approved by Office Director
FAA report
19890327004709A
Case key
17687

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

Failure of an alternator bearing which resulted in total loss of electrical power after the battery became discharged, and failure of the pilot to insure the gear was fully extended during a precautionary landing. The pilot's lack of familiarity with the gear extension system was a contributing factor.

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.

Airframe/component/system failure/malfunctionCruise - normal
Electrical system,alternator - failure,totalCause
Electrical system - inoperativeCause
Complete gear collapsedLanding - roll
Precautionary landing - initiatedPilot in command
Gear extension - improperPilot in commandCause
Gear down and locked - not attainedPilot in commandCause
Lack of familiarity with aircraftPilot in commandFactor
Terrain condition - roadway/highway

Analysis

Drg a x-country flt the alternator out light illuminated & the plt diverted to the closest arpt which was at Lamar, CO. The acft arrived at Lamar with the electrical system depleted. The plt was unable to extend the landing gear with the normal (electrical) system, so she extended the gear manually to what she thought was the fully extended position. She said the eng oil pressure gauge was indicating low, so she elected to land on a road. During the landing all three gear collapsed. Before stopping, the acft went off the side of the road & was further damaged. A post-acdnt inspn of the acft revealed an alternator bearing had failed. No reason for the rprtd drop in oil pressure was fnd.

Aircraft

Registration
N3042Z
Reported as
Beech F33A
Category
Airplane
Serial number
CE1114
Airframe hours
582
Engine
Continental IO-520-BB, 285 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Ruth M. Davis
Registered owner
S & R Farms, Inc
Last inspection
Annual · January 25, 1989 · 45 hours before
Departed
APA · Denver, CO
Destination
DDC · Dodge City, KS

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
61
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
1,317 total · 20 in this make and model

Weather

Conditions
Visual (VMC) · Day
Visibility
15 statute miles
Lowest ceiling
None
Temperature
70 °F

FAA reports on this event · 1

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