Maintenance Checks & Inspections

Question 1

What are maintenance programmes and schedules?

Answer 1

They outline a list of tasks with intervals specified in terms of flight hours, flight cycles or calendar time based on hard time, on-condition or condition monitoring criteria.

Question 2

What are the 2 types of maintenance systems?

Answer 2

• block (pyramid) maintenance system
• equalised (progressive) system

Question 3

What are the adv & dis of block (pyramid) maintenance system?

Answer 3

+ consistent preparation & completion times
+ stable workload
+ fixed content
+ efficient planning & control

• large gaps between checks leading to uneven workloads

Question 4

What are the adv & dis of equalised (progressive) system?

Answer 4

+ balancing of resources
+ more consistent workload
- additional costs due to repeated access work
- challenge of addressing emergent work that may require immediate attention

Question 5

What is the block (pyramid) system?

Answer 5

• A, B, C & D checks
• suitable for long haul a/c
• scheduled/ longer periods on the ground

Question 6

What is the equalised (progressive) system?

Answer 6

• e-checks
• short haul a/c
• completed more frequently/ shorter time

Question 7

A-check

Answer 7

1) every 500-800 fl/200-400 cycles
2) 20-50 mh
3) terminal or hangar overnight
4) can be delayed

Question 8

B-check

Answer 8

1) every 4-6 months
2) 150 mh
3) 1-3 days in hangar

Question 9

C- check

Answer 9

1) every 20-24 months/ specific fh defined by manufacturer
2) up to 6000 mh
3) 1-2 weeks in hangar
4) most a/c components to be inspected

Question 10

D-check

Answer 10

1) every 5 yrs
2) up to 50000 mh
3) 2 months in HM hangar
4) entire a/c stripped for inspection & overhaul