Incident Overview
Date: Saturday 9 July 1966
Aircraft Type: Martin 4-0-4
Owner/operator: Piedmont Airlines
Registration Number: N40446
Location: Roanoke Municipal Airport, VA (ROA) –
ÿ United States of America
Phase of Flight: Standing
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 42
Component Affected: Landing gear (switches, levers,craning mechanism)Landing gear (switches, levers,craning mechanism)
Investigating Agency: NTSBNTSB
Category: Accident
A landing gear retracted while parked on the apron during a routine maintenance procedure. The incident was likely caused by improper maintenance of the hydraulic system, specifically concerning reservoir lines, fittings, and the cranes mechanism.A landing gear retracted while parked on the apron during a routine maintenance procedure. The incident was likely caused by improper maintenance of the hydraulic system, specifically concerning reservoir lines, fittings, and the cranes mechanism.
Description
The landing gear retracted while parked on the apron. PROBABLE CAUSE: personnelÿ-ÿmaintenance,servicing,inspection:ÿimproperÿmaintenanceÿ(maintenanceÿpersonnel) systemsÿ-ÿhydraulicÿsystem:ÿreservoir,lines,fittings airframeÿ-ÿlandingÿgear:ÿswitches,levers,crankingÿmechanism,etc. miscellaneousÿacts, conditionsÿ-ÿdisregardÿofÿgoodÿoperatingÿpractice
Primary Cause
Improper maintenance of hydraulic system components, including reservoir lines, fittings, and the cranes mechanism.Improper maintenance of hydraulic system components, including reservoir lines, fittings, and the cranes mechanism.Share on:
