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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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August 14, 1984 · Piper PA-12 · N92740

Juneau, AK

Overview

Report Status
Preliminary report
Event Type
Accident
Date
August 14, 1984
Injury Outcomes
2 injuries (2 minor injuries)
Location
Juneau, AK
Aircraft
Piper PA-12
Tail Number
N92740
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
SEA84LA220

OVER A MOUNTAIN PASS THE ACFT ENCOUNTERED TURBULENCE THE PLT DESCRIBED AS 'SEVERE'. THE ACFT LOST 500 TO 1,000 FT AND TURNED 180 DEG. A 180 DEG CLIMBING TURN WAS INITIATED AND THE ACFT AGAIN FLEW INTO THE TURBULENCE. AFTER THE SECOND ENCOUNTER AILERON AND ELEVATOR CONTROL WERE NORMAL BUT RUDDER INPUTS WERE INEFFECTIVE. THE PLT REALIZED HE WOULD NOT BE ABLE TO CLEAR A RIDGE AHEAD AND FLEW INTO THE RISING TERRAIN IN A NOSE HIGH ATTITUDE. ON RECOVERY OF THE ACFT IT WAS NOTICED THAT THE RUDDER HAD FAILED ABOVE THE TOP HINGE POINT. A FLT PRECAUTION WAS ISSUED BY JUNEAU FSS WARNING OF MODERATE TO SEVERE TURBULENCE BELOW 5,000 FT, SPECIFICALLY NEAR MOUNTAIN PASSES. NO WX BRIEF WAS OBTAINED BY THE PLT.

Full Narrative

OVER A MOUNTAIN PASS THE ACFT ENCOUNTERED TURBULENCE THE PLT DESCRIBED AS 'SEVERE'. THE ACFT LOST 500 TO 1,000 FT AND TURNED 180 DEG. A 180 DEG CLIMBING TURN WAS INITIATED AND THE ACFT AGAIN FLEW INTO THE TURBULENCE. AFTER THE SECOND ENCOUNTER AILERON AND ELEVATOR CONTROL WERE NORMAL BUT RUDDER INPUTS WERE INEFFECTIVE. THE PLT REALIZED HE WOULD NOT BE ABLE TO CLEAR A RIDGE AHEAD AND FLEW INTO THE RISING TERRAIN IN A NOSE HIGH ATTITUDE. ON RECOVERY OF THE ACFT IT WAS NOTICED THAT THE RUDDER HAD FAILED ABOVE THE TOP HINGE POINT. A FLT PRECAUTION WAS ISSUED BY JUNEAU FSS WARNING OF MODERATE TO SEVERE TURBULENCE BELOW 5,000 FT, SPECIFICALLY NEAR MOUNTAIN PASSES. NO WX BRIEF WAS OBTAINED BY THE PLT.

Flight

Event TypeAccident
Event Time10:00 AKDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA-12
Tail NumberN92740
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-235-C1 · Reciprocating · 115
Seats2

People & Injuries

Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 31 · First Class

Conditions

ConditionsVMC
LightDaylight
Wind90° @ 5 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point70 F / 37 C
Altimeter30.00 inHg
Weather SourceWFAC

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Appendix: Source Data