In disposing of excess aircraft parts, the GSA Federal Supply Service office in your region reviews your SF 120, Report of Excess Personal Property (see § 102-2.135 of subchapter A of this chapter) for completeness and accuracy (of status, condition, and FSCAP and demilitarization codes if applicable) and ensures that the following certification is included on disposal documents (e.g., transfer orders or purchasers' receipts):