Thanks for asking this question before the start of the process, I am sure with below detailed process and suggestions will help you to get these repairs done smoothly. 

Regulation 

Important steps 

1. Coordination with supplier 

• A letter from the Supplier confirming that they are ready to accept the shipment for repair.

• Even if repair is free of cost as per Customs appropriate repair cost is required, please inform this regulation to supplier.

• Please align with supplier INCOTERMS, he may take all costs - freight both ways, insurance, customs clearance, etc. 

• Select a freight forwarder and single Customs broker in India who can handle both export clearance and import after repairs.  

• Obtain the price of defective parts from a supplier (it should be the same price mentioned in the import invoice against which you have already received) 

• Please align with the supplier to condition After repairs “Do not dispatch till specific Dispatch clarence” (this will help you to check the re-export invoice draft from the supplier)

• Export Invoice should have the following details.

• Value of defective part.
  • A declaration that the “Defective goods being sent for repair “
  • Details of earlier imports like Supplier Import Invoice Number & Date and Bill of Entry number & Date.
  • Description, Part Number, Serial Number of products
  • Any visible identification marks/numbers over the product

• Obtaining a “GR Waiver” from the Bank- 

A GR Waiver is to be obtained from the bank for the re-export of part. 

• Physical Examination (at your factory) to verify make/ model/ serial numbers/ part numbers before dispatch. 

To handle shipments without any errors and to avoid delay in Customs clearance, physical verification of make/ model/ serial numbers /part numbers is necessary before dispatch. It is advisable to invite a custom broker’s representative to verify/correlate the make/ model/ serial numbers/ part numbers mentioned on documents and physically on the part before packing. Take a photo of the part where sr no is visible This will help smooth export clearance and import clearance after repairs.  

• Export Clearance of goods at Customs

The Customs officer will conduct a physical examination and check all the marks and numbers on the export invoice/ packing list with a physical product.  Such examination report will help at the time of import clearance after repairs. 

• Re-import of goods by Supplier after Repair

The Supplier must prepare the draft invoice as per the instructions given below.

• Mentioning “Goods returned after Repair.”
• Export Invoice (Invoice against which part is received for repairs) Number and date.
• The make/ model/ serial number/ part number should be the same as the Export Invoice and must be the same physically on the equipment.
• The repair cost must be shown separately on the Invoice even if it is FOC. 
• The value of the part declared after Repair should be the same as the Export Invoice

• Scrutiny of advance set of dispatch documents & Dispatch clearance  

Ensure that all details mentioned are correct and then give dispatch clearance to the supplier.  Share details /documents with the Customs broker.

• Customs Clearance of re-import shipments

It takes a little more time than normal shipments as customs examination is involved. Please provide an Export S/B copy, export invoice, and examination report (If available) to the customs broker for clearance. Right from the first step of export care has been taken to ensure correctness and correlation to ensure smooth customs clearance. 

• Closure of GR waiver 

After customs clearance ensure that you submit Bill of entry to the bank and close the GR Waiver Co