Under FAA Regulations, maintenance must ensure the airframe is at least equal to its original properly altered condition.

Under FAA Regulations, maintenance must ensure the airframe is at least equal to its original properly altered condition.

• A. Must be at least equal to its original properly altered condition
• B. Is at least equal to its original properly altered condition
• C. Should be equal to the original condition
• D. May be operated without maintenance

Answer: (B)

The regulation describes the condition the airframe must be in after maintenance: it must be in a state that is at least equal to the original properly altered design. Using the linking verb "is" after the airframe keeps the sentence describing a current state you must achieve. The phrase “original properly altered condition” means the standard includes any FAA-approved alterations—the airframe should meet or exceed that baseline, not fall short. The other options don’t fit because they weaken or misstate the requirement or are grammatically awkward. Saying it “must be” at least equal is repetitive, “should” is softer and less definitive, and “may be operated without maintenance” is incorrect and unsafe.

The regulation describes the condition the airframe must be in after maintenance: it must be in a state that is at least equal to the original properly altered design. Using the linking verb "is" after the airframe keeps the sentence describing a current state you must achieve. The phrase “original properly altered condition” means the standard includes any FAA-approved alterations—the airframe should meet or exceed that baseline, not fall short.

The other options don’t fit because they weaken or misstate the requirement or are grammatically awkward. Saying it “must be” at least equal is repetitive, “should” is softer and less definitive, and “may be operated without maintenance” is incorrect and unsafe.