When you detect chafed or damaged wiring, what is the proper sequence to address it?

When you detect chafed or damaged wiring, what is the proper sequence to address it?

• A. Depower power, document the fault, repair or replace damaged wiring with approved parts, and protect with abrasion-resistant sleeving.
• B. Document the fault, depower power, repair or replace damaged wiring with approved parts, and protect with abrasion-resistant sleeving.
• C. Depower power, repair or replace damaged wiring, document the fault, and protect with abrasion-resistant sleeving.
• D. Depower power, document the fault, protect with abrasion-resistant sleeving, and then repair.

Answer: (A)

The main idea is to follow a safety-first, maintenance-traceability sequence when you find damaged wiring: make the system safe, document the fault, perform a proper repair with approved parts, then add protection to prevent recurrence. First, depowering the power eliminates the risk of shock, arcing, or further damage while you work. Next, document the fault so there’s a clear maintenance record and the issue is tracked for inspections and compliance. Then repair or replace the damaged wiring using parts and methods approved for the aircraft, ensuring the repair meets wiring standards and certification requirements. Finally, protect the repaired area with abrasion-resistant sleeving to guard against future chafing and to maintain proper harness protection. This order keeps people safe, ensures proper recordkeeping, and preserves airworthiness.

The main idea is to follow a safety-first, maintenance-traceability sequence when you find damaged wiring: make the system safe, document the fault, perform a proper repair with approved parts, then add protection to prevent recurrence. First, depowering the power eliminates the risk of shock, arcing, or further damage while you work. Next, document the fault so there’s a clear maintenance record and the issue is tracked for inspections and compliance. Then repair or replace the damaged wiring using parts and methods approved for the aircraft, ensuring the repair meets wiring standards and certification requirements. Finally, protect the repaired area with abrasion-resistant sleeving to guard against future chafing and to maintain proper harness protection. This order keeps people safe, ensures proper recordkeeping, and preserves airworthiness.