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).
Log of component breakages with corresponding running times and piece numbers.
| Identifier | ExFiles\Box 73\2\ scan0314 | |
| Date | 4th April 1924 guessed | |
| Total running time. hrs. mins. | Piece No. | Running time. hrs. mins. | BREAKAGES. Description and remarks. 96 45 | F.4614 | 9 0 | Front buffer spring broken, front joint side steering tube. | F.4614 | 9 0 | Rear buffer spring broken, front joint side steering tube. 98 57 | F.71004 | 14 38 | N.S. front spring (Firth 1000 lbs.) top leaf broken 2¼" to rear of centre bolt. 104 7 | F.4614 | 7 22 | Front buffer spring broken, front joint side steering tube. 105 57 | F.4614 | 79 27 | Front buffer spring broken, rear joint side steering tube. 110 8 | F.71008 | 13 23 | O.S. front spring(Firth 1200 lbs.) top leaf broken 2" to rear of c.b. | F.70898 | 42 43 | Dowel broken off side spring sheath. 111 48 | F.4272 | 111 48 | Steering pendulum broken at rocker shaft end. 112 23 | K.1111 | 34 16 | ⅜" bolt sheared in O.S. rear engine support. 117 40 | F.71006 | 18 43 | N.S. front spring (Firth 1100 lbs.) top leaf broken 1⅝" to rear of centre bolt. 119 40 | 7387 F.71006 | still running. | Crack in N.S. frame member running horizontally along base of 1st. cross member. 120 50 | K.1111 | 42 43 | ⅜" bolt sheared in N.S. rear engine support. 124 0 | F.4614 | 18 3 | Front buffer spring broken, rear joint side steering tube. | F.4614 | 73 0 | Rear buffer spring broken, rear joint side steering tube. | | still running | Slight crack in rear lug of N.S. front spring rear anchorage. 124 0 | F.2888 | " " | Crack started in O.S. flange 3rd. cross member. 125 44 | F.71006 | 15 36 | O.S. front spring (Firth 1100 lbs.) top leaf broken 2" to rear of centre bolt. 127 44 | F.71004 | 10 4 | N.S. front spring (Firths 1000 lbs) broken. | F.4614 | 30 59 | Rear buffer spring broken, front joint side steering tube. | ||