ATA 51 — Standard practices and structures (general)

Before you request a part

Your aircraft or engine manual determines the right part. A chapter helps you find the section, but does not prove that a part fits, can replace another part or is in stock.

Include these details when you can

• Full part number, including its ending
• Quantity needed
• Required condition
• Aircraft or engine model
• Where the part is used and its manual reference
• Date needed