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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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NTSB Report

January 23, 1990 · Mitsubishi MU2B-20 · N40RP

Nashville, TN

Overview

Report Status
Probable Cause
Event Type
Accident
Date
January 23, 1990
Injury Outcomes
No injuries (2 uninjured)
Location
Nashville, TN
Aircraft
Mitsubishi MU2B-20
Tail Number
N40RP
Operator
Transportation America
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL90LA053

AFTER ARRIVING AT THE DESTINATION THE LANDING GEAR COULD NOT BE EXTENDED. THE AIRPLANE WAS FLOWN BACK TO ITS BASE WHERE A GEAR UP LANDING WAS PERFORMED. EXAMINATION OF THE AIRPLANE REVEALED THAT THE LEFT GEAR DOOR DID NOT UNLOCK. THE EMERGENCY EXTENSION SYSTEM FAILED TO OPERATE AS A RESULT OF EITHER THE FAILURE OF THE CLUTCH ACTUATOR TO RESET AFTER THE LAST RETRACTION OR SLIPPAGE OF THE CLUTCH. THE PILOT'S REPORT STATED THAT THE DIRECTOR OF MAINTENANCE INDICATED THAT THE ACCIDENT COULD HAVE BEEN PREVENTED BY MORE FREQUENT LUBRICATION OF THE CLUTCH.

NTSB Probable Cause

INADEQUATE MAINTENANCE ADJUSTMENT OF THE LANDING GEAR SYSTEM WHICH RESULTED IN THE JAMMING OF THE LEFT GEAR DOOR.

Full Narrative

AFTER ARRIVING AT THE DESTINATION THE LANDING GEAR COULD NOT BE EXTENDED. THE AIRPLANE WAS FLOWN BACK TO ITS BASE WHERE A GEAR UP LANDING WAS PERFORMED. EXAMINATION OF THE AIRPLANE REVEALED THAT THE LEFT GEAR DOOR DID NOT UNLOCK. THE EMERGENCY EXTENSION SYSTEM FAILED TO OPERATE AS A RESULT OF EITHER THE FAILURE OF THE CLUTCH ACTUATOR TO RESET AFTER THE LAST RETRACTION OR SLIPPAGE OF THE CLUTCH. THE PILOT'S REPORT STATED THAT THE DIRECTOR OF MAINTENANCE INDICATED THAT THE ACCIDENT COULD HAVE BEEN PREVENTED BY MORE FREQUENT LUBRICATION OF THE CLUTCH.

Flight

Event TypeAccident
Event Time02:06 CST
Nearest AirportNashville Int'L (0nm N)
Runway20R
Runway Length7700 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftMitsubishi MU2B-20
Tail NumberN40RP
Aircraft CategoryAir
DamageSubstantial
OperatorTransportation America
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE 331-1 · Turboprop · 605
Seats2

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 41 · Second Class

Conditions

ConditionsVMC
LightBright Night
Wind200° @ 8 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point41 C / 30 C
Altimeter30.00 inHg
Observation Time07:02
Weather SourceWFAC

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Appendix: Source Data