| Item | Part No. | Part Name | Qty | Serial No. |
| 421-20-A1100 | SHAFT ASSEMBLY, UPPER | |||
| 1 | (NSS) | YOKE AND TUBE ASSEMBLY | ||
| 2 | 421-20-A1110 | SPIDER AND BOLT ASSEMBLY | ||
| 3 | 630 389 C91 | SPIDER AND BEARING ASSEMBLY | ||
| 4 | 01050-61255 | BOLT | ||
| 5 | 273 347 | FITTING | ||
| F1 - EFFECTIVE WITH S/N 5029 AND UP. | ||||