Maintenance in the CIS Environment

Question 1

Define the term “Maintenance”?

Answer 1

The term ‘maintenance’ in the CIS environment includes the action taken to retain materiel in an acceptable condition or to restore it to acceptability to sustain a particular role or pre-defined standard.

Question 2

State the reasons why maintenance is required?

Answer 2

• Minimise the engineering manpower and other resources required for the task.
• Minimise faults that would result in a situation hazardous to aircraft, associated equipment or personnel.
• Minimise faults that would result in an unacceptable loss of operational capability.
• Minimise faults that would result in expensive repairs and/or lengthy downtimes.
• Identify methods to improve operability, reliability and/or maintainability.
• Retain the condition of equipment until its out-of-Service date and to accommodate periods of intensive use if required.

Question 3

Define the term “Preventative Maintenance”?

Answer 3

Preventative maintenance is the systematic and prescribed work undertaken at predetermined intervals to reduce the probability of failure, to restore the inherent level of equipment reliability and to ensure that performance is not degraded by time or usage.

Question 4

Explain the term “Scheduled Maintenance”?

Answer 4

Scheduled maintenance is that preventive maintenance undertaken at regular, predetermined intervals to keep an item of technical equipment in a sound overall condition and to minimize the amount of corrective maintenance and other day-to-day attention it requires.

Question 5

Explain the term “Corrective Maintenance”?

Answer 5

Corrective maintenance embraces those maintenance activities carried out after a fault has occurred in order to restore an item to a serviceable state.

Question 6

Explain the “Four Lines of Maintenance”?

Answer 6

First Line.
- The User (Depth A)

Second Line.
- Specialist Within the Unit (Depth B)

Third Line.
- In Service and out of Unit (Depth C)

Fourth Line.
- Manufacturer (Depth C + D)

Question 7

Define the “Four Depths of Maintenance”?

Answer 7

Depth A.
• Daily Maintenance (First Line)

Depth B.
• Scheduled / Preventative Maintenance (second line)

Depth C.
• Repair or Partial Reconditioning (Corrective Maintenance) (Third Line)

Depth D.
• Full Reconditioning and Major Conversion of CIS Equipment (Forth Line)