Maintenance tasks and schedules are determined based on which criteria?
A. Hard time, on-condition, or condition monitoring
B. Pilot preference
C. Aircraft color and configuration
D. Airport availability
Answer: A. Hard time, on-condition, or condition monitoring
Which of the following is a characteristic of the Block (Pyramid) maintenance system?
A. Short, frequent checks distributed evenly
B. Tasks grouped together at increasing intervals
C. Checks always completed overnight
D. Minimal workload planning required
Answer: B. Tasks grouped together at increasing intervals
The Equalised (Progressive) maintenance system is most suitable for:
A. Long-haul carriers with older aircraft
B. Aircraft requiring minimal downtime, e.g., short-haul or low-cost carriers
C. Aircraft undergoing D-Checks every month
D. Aircraft not subject to scheduled maintenance
Answer: B. Aircraft requiring minimal downtime, e.g., short-haul or low-cost carriers
What is the approximate interval and man-hour requirement for an A‑Check?
A. Every 500–800 flight hours or 200–400 cycles; 20–50 man‑hours
B. Every 20–24 months; 6,000 man‑hours
C. Every 5 years; 50,000 man‑hours
D. Every 4–6 months; 150 man‑hours
Answer: A. Every 500–800 flight hours or 200–400 cycles; 20–50 man‑hours
Which statement correctly describes a D‑Check?
A. It is the least comprehensive check, done overnight
B. It requires stripping the entire aircraft and can take up to two months
C. It can be completed at the gate with 50 man‑hours
D. It occurs every 500 flight hours
Answer: B. It requires stripping the entire aircraft and can take up to two months
Which aircraft are required to comply with applicable Airworthiness Directives in the UK?
A. Only new aircraft under 2,730 kg MTOM
B. Only aircraft operated by licensed carriers
C. All aircraft on the UK Register
D. Aircraft manufactured in the UK only
Answer: C. All aircraft on the UK Register
Why are Airworthiness Directives (ADs) issued?
A. To recommend cosmetic improvements on aircraft
B. To address unsafe conditions and restore an acceptable level of safety
C. To reduce fuel consumption
D. To extend aircraft operational range
Answer: B. To address unsafe conditions and restore an acceptable level of safety
Which of the following is included in an Airworthiness Directive?
A. Identification of the unsafe condition
B. Pilot seating arrangements
C. Recommended airline routes
D. Weather limitations
Answer: A. Identification of the unsafe condition
An AMOC for an AD may be approved if:
A. It reduces the number of inspections required
B. It provides an equivalent level of safety to the original AD
C. It avoids having to comply with the AD entirely
D. It is cheaper to implement
Answer: B. It provides an equivalent level of safety to the original AD
Which statement is true about SSADs?
A. They can be freely shared with all operators worldwide
B. They include security-sensitive information and are distributed on a “need to know” basis
C. They only apply to aircraft in the EU
D. They replace normal ADs
Answer: B. They include security-sensitive information and are distributed on a “need to know” basis
When the CAA determines an unsafe condition exists, what is the responsibility of the type certificate holder?
A. Ignore the issue until requested by operators
B. Propose corrective actions or required inspections and submit them to the CAA for approval
C. Directly implement changes on all aircraft without approval
D. Only notify aircraft owners after two years
Answer: B. Propose corrective actions or required inspections and submit them to the CAA for approval
What happens to AMOCs when an AD is superseded?
A. They remain valid indefinitely
B. They are automatically invalidated, and a new application is required
C. They are only valid for new aircraft
D. They can be used to comply with the new AD without changes
Answer: B. They are automatically invalidated, and a new application is required
What is the primary purpose of a Service Bulletin (SB)?
A. To mandate inspections by law
B. To suggest optional improvements or modifications to the aircraft
C. To replace the Aircraft Maintenance Manual
D. To issue Airworthiness Directives automatically
Answer: B. To suggest optional improvements or modifications to the aircraft
Can an operator choose whether to implement a Service Bulletin?
A. No, it is always mandatory
B. Yes, unless it is mandated by an Airworthiness Directive
C. Only if approved by the CAA
D. Only for engine-related SBs
Answer: B. Yes, unless it is mandated by an Airworthiness Directive
Which of the following is NOT a compliance recommendation category for Service Bulletins?
A. Service Bulletin must be accomplished
B. Service Bulletin recommended to prevent operational disruptions
C. Service Bulletin for convenience or option
D. Service Bulletin automatically becomes an Airworthiness Directive
Answer: D. Service Bulletin automatically becomes an Airworthiness Directive
Service Bulletins may include modifications to:
A. Aircraft, engine, accessories, or embedded software
B. Only the fuselage structure
C. Only the cockpit instruments
D. Only pilot operating procedures
Answer: A. Aircraft, engine, accessories, or embedded software
What type of inspections can a Service Bulletin require?
A. One-time inspections for flaws or manufacturing errors
B. Routine inspections in the Aircraft Maintenance Manual
C. Standard annual engine checks only
D. Only inspections required by the CAA
Answer: A. One-time inspections for flaws or manufacturing errors
If a Service Bulletin becomes invalid, what must be done?
A. The SB can simply be cancelled
B. A revision or new SB must be issued to restore units to the preferred configuration
C. Operators can ignore the SB
D. Only an Airworthiness Directive can replace it
Answer: B. A revision or new SB must be issued to restore units to the preferred configuration
Which publications cannot be used to transmit actions requiring a record of accomplishment?
A. Aircraft Maintenance Manual
B. Service Bulletins
C. Other correspondences like Service Information Letters (SILs)
D. Engine Conversion SBs
Answer: C. Other correspondences like Service Information Letters (SILs)
Which type of SB is issued for urgent matters affecting safety?
A. Standard SB
B. Alert SB
C. Engine Conversion SB
D. Service Information Letter (SIL)
Answer: B. Alert SB
What is the purpose of an Engine Conversion Service Bulletin?
A. To mandate engine replacements by law
B. To provide information for converting engine models from one designation to another
C. To issue routine engine inspections
D. To replace the engine maintenance manual
Answer: B. To provide information for converting engine models from one designation to another
What is the function of a Service Information Letter (SIL)?
A. It mandates immediate action on the aircraft
B. It provides advisory or useful information but is not mandatory
C. It replaces an Airworthiness Directive
D. It is used to cancel Service Bulletins
Answer: B. It provides advisory or useful information but is not mandatory
Who must assess damage to an aircraft or component before repair?
A. Only the aircraft owner
B. Only the CAA
C. The person or organisation performing the repair
D. The operator’s pilot
Answer: C. The person or organisation performing the repair
Which of the following sources can be used for approved repair or modification data?
A. Data approved by the UK CAA
B. Data from any online forum
C. Data approved by a design organisation complying with Annex I (Part-21)
D. Data in internal company emails
Choose all that apply.
Answers: A. Data approved by the UK CAA and C. Data approved by a design organisation complying with Annex I (Part-21)
