From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Diagram illustrating cracks found on a mechanical component.
| Identifier | ExFiles\Box 168a\3\ img063 | |
| Date | 7th July 1939 guessed | |
| CRACKED IN RAD CRACKS TOWARDS HOLES | ||