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Malfunctions. They drive everything! Written and presented by: Jacqui Chapman. Introduction. The number and complexity of malfunctions are the cornerstone to the depth of simulation required. The Question. Why is it different from operator training?

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malfunctions

Malfunctions

They drive everything!

Written and presented by: Jacqui Chapman

introduction
Introduction

The number and complexity of malfunctions are the cornerstone to the depth of simulation required.

WATS 2009

the question
The Question
  • Why is it different from operator training?
  • What is the function of maintainer training?

WATS 2009

operator vs maintainer training
Operator vs. Maintainer Training

Cause and Effect

  • Where the emphasis is on the effects of a malfunction and it is how an operator reacts to it that is all important
  • Where the cause of the malfunction is what a maintainer is trying to discover, using the effect as part of a fault diagnosis procedure.

WATS 2009

training
Training

Form, Fit, Feel, Fidelity and Function

  • Form – shape of..
  • Fit – well suited
  • Feel – ascertain by touch
  • Fidelity – precision in reproduction
  • Function – mode of activity by which a thing fulfils its purpose
  • Malfunction requirements will help drive the final solution

WATS 2009

maintenance tasks
Maintenance Tasks
  • Scheduled Maintenance
  • Malfunction Diagnosis
  • Malfunction Rectification

WATS 2009

level of maintenance
Level of Maintenance
  • Confirm that there is a malfunction and isolate
  • Interpretation of monitoring data
  • Identify the component that has malfunctioned

WATS 2009

malfunction simulation
Malfunction Simulation
  • Confirmation of Failure

WATS 2009

malfunction simulation1
Malfunction Simulation
  • Interpretationof Health and Usage Monitoring System

WATS 2009

malfunction simulation2
Malfunction Simulation
  • Use of test equipment, failure flow charts

WATS 2009

procedural vs free play
Procedural vs. ‘Free Play’
  • Fault Propagation
    • Does the simulation need to display secondary effects?
  • Diagnosis and Rectification
    • Does the simulation need to react to deviation?
      • No – procedural
      • Yes – Free play

WATS 2009

confirmation of failure

IF Engine > x rpm AND Power > 24V dc THEN

Pressure Indicators = 3000 psi

No Trigger to CWS

Flying Controls, Landing Gear & Brakes respond correctly

IFEND

ELSE IF fault applied THEN

Pressure Indicators = 0 psi

Trigger the CWS

Flying Controls, Landing Gear & Brakes do not respond

END IF

Confirmation of Failure

IF Engine > x rpm AND Power > 24V dc AND no fault applied THEN

Pressure Indicators = 3000 psi

No Trigger to CWS

Flying Controls, Landing Gear & Brakes respond correctly

IFEND

WATS 2009

interpretation of hums
Interpretation of HUMS

If HUMS connected and switched on then

HUMS unit = ON

Freeplay

Switching off systems

Disconnecting connectors

Incorrect selection of HUMS unit

Failures in other system impacting original system

  • Procedural

If no fault applied then

If HUMS O/P = then

System response

HUMS display

Else if fault a then

If HUMS O/P = then

System response

HUMS display …

WATS 2009

use of test equipment
Use of Test Equipment

If STTE connected and switched on then

STTE unit = ON

  • Procedural

If no fault applied then

If STTE O/P = then

System response

STTE display

Else if fault a then

If STTE O/P = then

System response

STTE display …

  • Freeplay
  • Switching off systems
  • Disconnecting connectors
  • Incorrect selection of HUMS unit
  • Failures in other system impacting original system

WATS 2009

one solution
One Solution
  • Object Orientated Design
    • All components emulated

Get propagation automatically

WATS 2009

simulate vs emulate
Simulate vs. Emulate
  • Simulate is to have the appearance, form, feel and function of…
  • Emulate is to attempt to equal functionality without necessarily providing form and feel.

WATS 2009

conclusion
Conclusion
  • Understand the level of malfunction coverage required
  • Understand what the maintainer is being trained to do in reaction to a malfunction
  • Form, Fit, Feel, Fidelity and Function

WATS 2009

malfunctions1

Malfunctions

They drive everything

[email protected]

www.pennantplc.co.uk

WATS 2009