Details
- Number of pages: 2
- Part Number: No. 121
- Revision Date: 31-Mar-1947
- Description: Ref 551 - New Thrust Bearing for 5-A Head, Ref 552 - Desiccator Cover Plate, Ref 553 - Standardization of Head Castings for all Mechanical Head Governors, Ref 554 - New Design for Spider-Shaft Seal Ring for Model 23EX Propellers