| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 21T-04-31130 | Vent Assembly | 8173- | |
| 1 | 21T-04-31170 | Cap Assembly | 8173- | |
| 2 | 07042-70312 | Plug | 8173- | |
| 3 | 561-98-82110 | Nipple Assembly | 8173- | |
| 4 | 561-98-8A130 | Cap Assembly | 10000- | |
| 4 | 566-98-15300 | Cap Assembly | 8173-9999 | |
| 5 | 01010-80816 | Bolt | 8173- | |
| 6 | 01643-30823 | Washer | 8173- | |
| 7 | 561-04-83110 | Cover | 8173- | |
| 8 | 01010-81020 | Bolt | 8173- | |
| 9 | 01643-31032 | Washer | 8173- |