What is the primary purpose of ASA Part 21?
A. Regulates aircraft flight operations
B. Defines pilot licensing standards
C. Regulates design, production, and airworthiness certification
D. Sets airport construction requirements
Answer: C. Regulates design, production, and airworthiness certification ✔
What certificate is issued after an aircraft is successfully designed, built, and tested?
A. Certificate of Airworthiness
B. Air Operator Certificate
C. Type Certificate
D. Supplemental Type Certificate
Answer: C. Type Certificate ✔
An aircraft cannot fly unless it bears:
A. A valid MEL
B. National registration markings
C. Manufacturer serial markings
D. ATC-approved route markings
Answer: B. National registration markings ✔
What certificate proves an individual aircraft is safe for flight?
A. AOC
B. Type Certificate
C. Certificate of Airworthiness
D. Registration Certificate
Answer: C. Certificate of Airworthiness ✔
What must an operator obtain before using an aircraft for transport operations?
A. Manufacturer’s approval
B. Air Operator Certificate (AOC)
C. Maintenance Licence
D. Production Certificate
Answer: B. Air Operator Certificate (AOC)
Operators must have a reliability programme to:
A. Schedule pilot training
B. Test the adequacy of their maintenance schedule
C. Monitor airport safety
D. Record flight time
Answer: B. Test the adequacy of their maintenance schedule ✔
21.A.3A requires certificate holders to maintain a system for:
A. Collecting aircraft fuel samples
B. Tracking passenger lists
C. Reporting failures, malfunctions, and defects
D. Managing pilot qualifications
Answer: C. Reporting failures, malfunctions, and defects ✔
Reports of possible unsafe conditions must be sent to the CAA within:
A. 24 hours
B. 72 hours
C. 1 week
D. 5 days
Answer: B. 72 hours ✔
If a reported issue is caused by a design or manufacturing deficiency, the certificate holder must:
A. Replace all affected parts immediately
B. Notify pilots
C. Investigate and report corrective actions to the CAA
D. Stop production permanently
Answer: C. Investigate and report corrective actions to the CAA ✔
What is an airworthiness directive (AD)?
A. A suggestion by the CAA
B. A mandatory action to restore safety
C. A maintenance contract
D. A voluntary service bulletin
Answer: B. A mandatory action to restore safety ✔
The CAA issues an AD when:
A. Airlines request it
B. A manufacturer requests it
C. An unsafe condition exists and may exist in other aircraft
D. Only when an aircraft crashes
Answer: C. An unsafe condition exists and may exist in other aircraft ✔
When an AD is issued, the certificate holder must:
A. Ignore previous maintenance records
B. Propose corrective actions for CAA approval
C. Ground all aircraft
D. Suspend operations indefinitely
Answer: B. Propose corrective actions for CAA approval ✔
An AD must include:
A. Aircraft paint requirements
B. Compliance time and identification of unsafe condition
C. Ticketing procedure
D. Cabin layout
Answer: B. Compliance time and identification of unsafe condition ✔
What is an AMOC?
A. Alternate Manufacturer Operation Certificate
B. Alternative Method of Compliance
C. Advanced Maintenance Operations Code
D. Airworthiness Monitoring Oversight Checklist
Answer: B. Alternative Method of Compliance ✔
AMOCs must demonstrate:
A. Reduced workload
B. Faster compliance
C. Equal level of safety compared to original AD
D. Cost efficiency
Answer: C. Equal level of safety compared to original AD ✔
If an AD is superseded, its AMOCs become:
A. Automatically valid
B. Automatically invalid
C. No longer required
D. Optional
Answer: B. Automatically invalid ✔
What is an SSAD?
A. Safety System Aircraft Directive
B. Secure Structural AD
C. Sensitive Security Airworthiness Directive
D. Standard Safety Advisory Document
Answer: C. Sensitive Security Airworthiness Directive ✔
SSADs contain:
A. Airline commercial data
B. Security-sensitive airworthiness information
C. Passenger identity lists
D. Aircraft financial information
Answer: B. Security-sensitive airworthiness information ✔
SSADs are distributed:
A. Publicly on all aviation websites
B. On a need-to-know basis
C. Only to passengers
D. Only to aircraft manufacturers
Answer: B. On a need-to-know basis ✔
What does Subpart M of Part 21 cover?
A. Routine maintenance
B. Repairs
C. Pilot training
D. Airport certification
Answer: B. Repairs ✔
What is NOT considered a repair under Subpart M?
A. Replacement of parts without design activity
B. Structural patching
C. Restoring airworthy condition
D. Damage removal requiring design approval
Answer: A. Replacement of parts without design activity ✔
Standard repairs apply to aircraft such as:
A. Large transport jets over 100,000 kg
B. Aeroplanes ≤ 5,700 kg MTOM
C. Spacecraft
D. Military fighters
Answer: B. Aeroplanes ≤ 5,700 kg MTOM ✔
A repair design must be classified as:
A. Low-risk or high-risk
B. Temporary or permanent
C. Major or minor
D. Basic or advanced
Answer: C. Major or minor ✔
Repair parts must be produced by:
A. Any engineering shop
B. Approved production or maintenance organisations
C. Airlines only
D. Flight crew
Answer: B. Approved production or maintenance organisations ✔