M10.7 Flashcards
(26 cards)
What document outlines maintenance intervals?
The AMP
What is used to measure maintenance intervals?
Flight hours, flight cycles, or calendar time
How are maintenance interval determined?
Hard time, in-condition, or condition monitoring criteria
What are the two main maintenance interval systems?
- Block (Pyramid)
- Equalised (Progressive)
How is the Block (Pyramid) system represented?
Letter checks
How often are A-Checks conducted?
Every 500-800 flight hours or 200-400 flight cycles
When/ how long does an A-Check take?
It can be done overnight.
How often are B-Checks conducted?
Every 4-6 months
How long does a B-Check take?
Approx 1-3 days
How often is a C-Check conducted?
Every 20-24 months
How long does a C-Check take?
Approx 1-2 weeks
How often is a D-Check conducted?
Approx every 5 years
How long does a D-Check take?
Up to 2 months
How many D-Checks will a commercial aircraft usually undergo?
2-3 before retirement
What is an Airworthiness Directive (AD)?
They are documents that contain mandatory actions to restore an acceptable level of safety, when there is evidence to suggest aircraft safety has been compromised.
Who may produce Airworthiness Directive?
The holder of the relevant design/manufacturer.
Who issues Service Bulletins (SB)?
The type certificate holder
What is a Service Bulletin (SB)
Optional items for operators that are an improvement on the original design, resulting on lower maintenance costs or increased performance.
What are the 4 SB compliance recommendation categories?
- Service bulletin must be accomplished
- Service bulletin recommended to be accomplished to prevent significant operational disruption
- Service bulletin to introduce improvements
- Service bulletin for convenience or option
What are the 3 types of Service Bulletin (SB)?
- Alert SB - Matters requiring urgent attention, usually safety related
- Standard SB
- Engine Conversion SB
What is a Service Information Letter (SIL)?
A Service Information Letter (SIL) is the document used by manufacturers to communicate to the operators, the advisory action and other ‘useful information’ about their product to enhance safety, reliability, or reduce repetitive costs.
SILS are information only, not mandatory
How long is a Category A MEL Rectification Interval?
Category A - No standard interval is specified. However items in this category shall be rectified in accordance with the MMEL.
How long is a Category B MEL Rectification Interval?
Category B - Rectified within 3 calendar days
How long is a Category C MEL Rectification Interval?
Category C - Rectified within 10 calendar days
