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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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November 15, 1985 · Beech A45 · N422NM

Albuquerque, NM

Overview

Report Status
Preliminary report
Event Type
Accident
Date
November 15, 1985
Injury Outcomes
2 injuries (2 serious injuries)
Location
Albuquerque, NM
Aircraft
Beech A45
Tail Number
N422NM
Operator
Civil Air Patrol
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
DEN86FA023

WHILE MANEUVERING TO ENTER TRAFFIC AT ALAMEDA ARPT, THE PLT EXPERIENCED SEVERE ACFT VIBRATIONS. HE ATTEMPTED BUT WAS NOT ABLE TO REACH THE ARPT DUE TO RAPID LOSS OF AIRSPEED ANDALTITUDE. THE ACFT CRASHED 1/2 MILE FROM THE LANDING RWY. THE ONE PAX AND A WITNESS INDICATED THAT THE ACFT STALLED 20-30 FT AGL. THE INVESTIGATION REVEALED A FRACTURED PROPELLERPITCH ACTUATING PIN WHICH WAS CAUSED BY A RECENT IMPROPER OVERHAUL. THE HOLE IN WHICH THE PIN WAS INSTALLED WAS IMPROPERLY DRILLED, ALLOWING THE PIN TO BOTTOM OUT BEFORE TORQUE COULD BE APPLIED TO THE SHAFT. EXAMINATION OF THE FRACTURED SURFACES BY METALLURGIAL LABORATORY ANALYSIS REVEALED A PROGRESSIVE TYPE OF FAILURE.

Full Narrative

WHILE MANEUVERING TO ENTER TRAFFIC AT ALAMEDA ARPT, THE PLT EXPERIENCED SEVERE ACFT VIBRATIONS. HE ATTEMPTED BUT WAS NOT ABLE TO REACH THE ARPT DUE TO RAPID LOSS OF AIRSPEED ANDALTITUDE. THE ACFT CRASHED 1/2 MILE FROM THE LANDING RWY. THE ONE PAX AND A WITNESS INDICATED THAT THE ACFT STALLED 20-30 FT AGL. THE INVESTIGATION REVEALED A FRACTURED PROPELLERPITCH ACTUATING PIN WHICH WAS CAUSED BY A RECENT IMPROPER OVERHAUL. THE HOLE IN WHICH THE PIN WAS INSTALLED WAS IMPROPERLY DRILLED, ALLOWING THE PIN TO BOTTOM OUT BEFORE TORQUE COULD BE APPLIED TO THE SHAFT. EXAMINATION OF THE FRACTURED SURFACES BY METALLURGIAL LABORATORY ANALYSIS REVEALED A PROGRESSIVE TYPE OF FAILURE.

Flight

Event TypeAccident
Event Time15:03 MST
Nearest AirportALAMEDA (1nm S)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBeech A45
Tail NumberN422NM
Aircraft CategoryAir
DamageSubstantial
OperatorCivil Air Patrol
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · I0-520 SERIES · Reciprocating · 285
Seats2

People & Injuries

Injury Summary2 injuries (2 serious injuries)
Fatal0
Serious2
Minor0
Uninjured0
Total2
Crew 1Age 60 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind310° @ 10 kt
Visibility60 sm
CeilingNone
Temperature / Dew Point46 / 19 C
Altimeter30.00 inHg
Observation Time21:49
Weather SourceWFAC

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Appendix: Source Data