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CRITICAL FAULT [6 records]

Record 1 2011-01-11

English

Subject field(s)
  • Aeronautical Engineering and Maintenance
  • Helicopters (Military)
CONT

Capture Wear-generated Debris in Transmission and Gearboxes! Early Warning of Failure in Gears and Bearings. Magnetic chip collection is the most economical and direct form of lube system failure detection in use today. Usually located in a gearbox or reservoir drain plug location, the magnetic chip collector captures and retains particles for later removal and off-line analysis.

CONT

Provision is made for the fitting of magnetic chip detectors at the scavenge pump inlets to sample return oil from individual engine main bearings.

OBS

This device is differentiated from the ubiquitous magnetic drain plug through the use of a unique self-closing valve, which permits the chip collector to be withdrawn without loss of lube or hydraulic oil. It is no longer necessary to wait until an oil change to assess the condition of critical gears and bearings. The chip collector can also be line-mounted, closer to the potential failure point, for fault isolation or even greater assurance of detecting a failure.

OBS

chip detector: term officially approved by the Aeronautical Terminology Standardization Committee (ATSC) - Helicopters.

French

Domaine(s)
  • Aérotechnique et maintenance
  • Hélicoptères (Militaire)
CONT

L'enquête, menée par Pratt & Whitney Canada Inc., fabricant du moteur, a permis de déterminer que la dent d'un engrenage métallique trouvée dans le détecteur de limaille provenait d'un élément du dispositif d'alimentation électrique de secours du régulateur d'arrivée de carburant.

OBS

détecteur magnétique de particules : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance.

OBS

détecteur de particules : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptères.

Key term(s)
  • détecteur de limailles

Spanish

Save record 1

Record 2 2009-04-02

English

Subject field(s)
  • Electrical Engineering
DEF

The voltage that appears across the terminals after current interruption.

OBS

It is a critical parameter for fault interruption by a high-voltage circuit breaker, its characteristics(amplitude, rate of rise) can lead either to a successful current interruption or to a failure(called reignition or restrike).

OBS

transient recovery voltage: term standardized by the International Electrotechnical Commission (IEC).

PHR

Prospective transient recovery voltage.

French

Domaine(s)
  • Électrotechnique
DEF

Tension électrique qui se rétablit aux bornes d'un appareillage électrique lorsqu'il interrompt un courant alternatif.

OBS

C'est un paramètre qui influe fortement sur la réussite d'une coupure de courant dans un réseau à haute tension.

OBS

tension transitoire de rétablissement : terme normalisé par la Commission électrotechnique internationale (CEI).

PHR

Tension transitoire de rétablissement présumée.

Spanish

Save record 2

Record 3 2007-08-22

English

Subject field(s)
  • Translation (General)
  • Geology
OBS

Criss-crossed all over the 37 mile long plain at Nazca are an assortment of geometrically straight lines, some running parallel, others crossing over and intersecting other lines. This outstanding geometric ground form remained undiscovered until the early 1930s when it was noticed by the first aerial flights over the area during aerial survey work to locate water sources.

OBS

The watershed consists of low lying moderate sloping low lying hills with thick vegetation, criss-crossed by gentle sloping topography and small discharge zones in the central portion of the watershed.

OBS

If accurate, the prediction method would be critical in an area like California, which is criss-crossed by fault lines that have spawned devastating quakes over the years including ones which ravaged San Francisco in 1989 and Los Angeles in 1994.

French

Domaine(s)
  • Traduction (Généralités)
  • Géologie
OBS

sillonner : Parcourir, traverser d'un bout à l'autre ou en tous sens. [...] En parlant des voies de communications, traverser de part en part, s'étendre dans toutes les directions.

OBS

[...] elle s'aperçut que les mille rides qui le sillonnaient, aussi nombreuses que la peau craquelée d'un brugnon, étaient agitées d'un frisson presque imperceptible [...]

Spanish

Save record 3

Record 4 2003-02-26

English

Subject field(s)
  • Electronic Defects and Failures
  • Spacecraft
CONT

For ascent and descent vehicles, the time constraints of the dynamic flight modes preclude the opportunity to utilize in-flight maintenance and system reconfiguration to recover from failures. Therefore, two-fault tolerance is a critical element in ensuring adequate vehicle reliability and should be incorporated whenever possible. When two-fault tolerance is either impractical or may have a negative impact on overall vehicle reliability, single fault tolerance will be provided wherein no single-failure will result in the loss of the crew.

Key term(s)
  • two fault tolerance

French

Domaine(s)
  • Défectuosités et pannes (Électronique)
  • Engins spatiaux

Spanish

Save record 4

Record 5 2001-11-28

English

Subject field(s)
  • Electrical Power Supply
  • Electric Currents
CONT

The enormous current generated during a short circuit produces damaging heat at a much faster rate than can be safely dispersed. Interrupt the current and you stop adding heat to the system. Time is a critical determinant of the amount of heat(energy) added. An electrical short that lasts three cycles, for example, adds six times the energy of one lasting just one-half cycle. It's in this sense that all circuit breakers and fuses "limit" current. Add a current limiting device, i. e. ususally a fuse, but sometimes a circuit breaker and fuse in series, that restricts the fault current to a value less than the starter's short-circuit withstand rating.

French

Domaine(s)
  • Alimentation (Distribution électrique)
  • Courants (Électrocinétique)

Spanish

Save record 5

Record 6 1978-05-07

English

Subject field(s)
  • Geology
OBS

A slide resulting from the pressure of a plane of weakness, e. g., fault, dyke or soft layer, in a critical orientation within the slope. Large segments of the slope move down along this plane.

French

Domaine(s)
  • Géologie
OBS

Un éboulement résultant de la présence d'un plan de faiblesse, e.g., une faible, un dyke, ou une couche tendre dans une orientation critique à l'intérieur du talus. De gros segments du talus descendent le long de ce plan.

Spanish

Save record 6

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