What topic does the code 91 represent?

What topic does the code 91 represent?

• A. Test and Evaluation
• B. Safety
• C. Personnel
• D. First position

Answer: (B)

Codes in the crew chief materials are organized so each topic has a specific number. The 90s block is reserved for safety-related content, and the number 91 is assigned to Safety. So when you see 91, you’re expected to study material that covers hazard recognition, safe work practices, personal protective equipment, and safety-of-flight responsibilities. Safety underpins every action in maintenance, which is why this code is used to flag that topic. The other topics—Test and Evaluation, Personnel, and First position—are associated with different codes, not 91.

Codes in the crew chief materials are organized so each topic has a specific number. The 90s block is reserved for safety-related content, and the number 91 is assigned to Safety. So when you see 91, you’re expected to study material that covers hazard recognition, safe work practices, personal protective equipment, and safety-of-flight responsibilities. Safety underpins every action in maintenance, which is why this code is used to flag that topic. The other topics—Test and Evaluation, Personnel, and First position—are associated with different codes, not 91.