10.7 Applicable Requirements Flashcards
(94 cards)
What are the 3 types of criteria that maintenance is based on?
- Hard time.
- On condition.
- Condition Monitoring.
What are the features of the Block System (Pyramid) maintenance schedule?
- Uses A, B, C, and D checks.
- Tasks are grouped together.
- Tasks increase with increasing flight hours.
Which type of operators are more suited to the Block (Pyramid) system?
Long haul operators with older aircraft, which can have longer periods on the ground for downtime.
What are the benefits of the block (pyramid) system?
Consistency, stable workload, efficient planning.
What’s the negative of the block (pyramid) system?
Large gaps between checks, and long periods out of service.
What are the features of the Equalised (progressive) system?
- Uses E checks.
- Contains same tasks as block system, but are shorter, equally sized, more frequent checks.
Which operators are more suited to the Equalised (progressive) system?
Short-haul operators with newer aircraft, that require the minimum amount of downtime for maintenance.
What are the benefits of the Equalised (progressive) system?
Balanced resources, more consistent workload.
What are the negatives of the equalised (progressive) system?
Additional costs from repeated access more frequently.
Discovering large defects becomes an issue for time and money.
Roughly how often are A-checks carried out?
Every 500-800 hours or 200-400 cycles.
Can A-checks be delayed?
Yes, if certain predetermined conditions are met.
How long do A-Checks normally last?
Can be done overnight.
How often are B-checks usually carried out?
Every 4-6 months.
How long do B-checks normally take?
Roughly 1-3 days.
How can a complete B-check be performed, using only a series of A-checks?
By carrying out A-check 1 to A-check 10.
How often are C-checks carried out?
Every 20-24 months, or by a specified amount of flight hours defined by the operator.
How often do C-checks normally last?
1-2 weeks.
How often are D-checks (heavy maintenance visit) carried out?
Every 5 years.
How long can D-checks usually take?
2 months.
Are Service Bulletins (SBs) mandatory?
Only if the SB is a result of an AD.
Otherwise, it’s up to the operator.
What are the 4 compliance categories of SB?
- SB must be accomplished.
- SB recommend to be accomplished.
- SB for improvements.
- SB for Convenience/Option.
Can an SB be cancelled once it’s been issued?
No.
If a new SB is issued, what happens to the previous SB?
A revision to the invalidated SB must also be issued to stop its progression.
What must SBs not be used for?
To cover other inspections, standard repairs, or maintenance practices.