| Description | Date | Identifier | |
| Payment issues and engine valve problems for Capt. Staniland's Bentley. | 30th Mar 1939 | Box 131 \ 3 scan0053 | |
| Establishing a procedure to centralise information on parts that fail in service. | 5th Apr 1939 | Box 131 \ 3 scan0054 | |
| Cover sheet for charts detailing complaints about the 4¼ Litre Bentley. | 17th Apr 1939 | Box 131 \ 3 scan0055 | |
| Chart tracking engine complaints for the 4¼ Bentley model during 1939. | 1st Jan 1939 | Box 131 \ 3 scan0056 | |
| Blank chart for tracking 1939 engine failures on 3 1/2 and 4 1/4 litre Bentley cars. | 30th Jun 1939 | Box 131 \ 3 scan0057 | |
| Chart tracking various engine faults and modifications over the first six months of 1939. | 30th Jun 1939 | Box 131 \ 3 scan0058 | |
| Blueprint chart tracking component failures and complaints for the first half of 1939. | 30th Jun 1939 | Box 131 \ 3 scan0059 | |
| Bar chart tracking clutch and brake issues and repairs by month for the first half of 1939. | 30th Jun 1939 | Box 131 \ 3 scan0060 | |
| Blueprint bar chart tracking vehicle mechanical faults over a six-month period in 1939. | 30th Jun 1939 | Box 131 \ 3 scan0061 | |
| Fault analysis chart for various vehicle components from January to June 1939, showing the frequency of different issues. | 1st Jan 1939 | Box 131 \ 3 scan0062 | |
| Obtaining cylinder measurements from four Chevrolet and one Pontiac engines. | 17th Apr 1939 | Box 131 \ 3 scan0063 | |
| Thank you letter concerning cylinder bore figures and requesting further information. | 20th Apr 1939 | Box 131 \ 3 scan0064 | |
| Cover note for amended charts of 4 1/4 Litre Bentley complaints up to the end of March. | 22th Apr 1939 | Box 131 \ 3 scan0065 | |
| Monthly bar chart tracking various engine issues and their resolutions from January to June 1939. | 30th Jun 1939 | Box 131 \ 3 scan0066 | |
| Bar chart tracking various rear axle and silencer faults over the first six months of 1939. | 1st Jan 1939 | Box 131 \ 3 scan0067 | |
| Bar chart tracking clutch and brake faults reported between January and June 1939. | 1st Jan 1939 | Box 131 \ 3 scan0068 | |
| Blueprint chart tracking vehicle faults over the first half of 1939. | 1st Jul 1939 | Box 131 \ 3 scan0069 | |
| Blueprint chart tracking component faults by month for the first half of 1939. | 25th Apr 1939 | Box 131 \ 3 scan0070 | |
| Covering letter enclosing communication from the Zenith Carburetter Co. regarding product complaints. | 25th Apr 1939 | Box 131 \ 3 scan0071 | |
| Letter from Zenith Carburetter Co. Ltd. regarding carburettor issues for 'Wraith' and 'Phantom III' models. | 20th Apr 1939 | Box 131 \ 3 scan0072 | |
| Letter from The Zenith Carburetter Co. Ltd. responding to complaints about their products. | 10th May 1939 | Box 131 \ 3 scan0073 | |
| Charts of complaints for the 4¼ Litre Bentley. | 10th May 1939 | Box 131 \ 3 scan0074 | |
| Chart tracking vehicle component faults and average mileage over several months in 1939. | 1st Jan 1939 | Box 131 \ 3 scan0075 | |
| Monthly fault analysis bar chart from January to June 1939. | 1st Jun 1939 | Box 131 \ 3 scan0076 | |
| Fault analysis chart from 1939 tracking clutch and brake issues over six months. | 1st Jun 1939 | Box 131 \ 3 scan0077 | |
| Bar chart tracking vehicle faults and complaints from January to June 1939. | 1st Jun 1939 | Box 131 \ 3 scan0078 | |
| Bar chart tracking various engine faults and their causes over a six-month period in 1939. | 1st Jun 1939 | Box 131 \ 3 scan0079 | |
| Chart tracking engine failures for 3 1/2 and 4 1/4 Bentley models for the year 1939. | 1st Jun 1939 | Box 131 \ 3 scan0080 | |
| Bar chart tracking various engine complaints for the 4 1/4 Bentley model during the first half of 1939. | 15th May 1939 | Box 131 \ 3 scan0081 | |
| Acquisition of cylinder wear data for Packard and V.8. Ford vehicles. | 15th May 1939 | Box 131 \ 3 scan0082 | |
| Broken front exhaust expansion chamber supports for a Wraith WXA-37. | 18th May 1939 | Box 131 \ 3 scan0083 | |
| Failure of tubular stays on the Wraith front expansion chamber supports due to compression. | 20th May 1939 | Box 131 \ 3 scan0084 | |
| Query about troubleshooting fierce clutches with graphite bronze friction linings on 25 HP models. | 24th May 1939 | Box 131 \ 3 scan0085 | |
| Clutch fierceness in the 20/25 model with graphite bronze facings. | 25th May 1939 | Box 131 \ 3 scan0086 | |
| Cover note for amended charts regarding 4 1/4 Litre Bentley complaints up to the end of May. | 20th Jun 1939 | Box 131 \ 3 scan0087 | |
| Bar chart tracking monthly complaints for the 4 1/4 Bentley engine from January to June 1939. | 30th Jun 1939 | Box 131 \ 3 scan0088 | |
| Chart tracking engine failures for 3 1/2 and 4 1/4 litre Bentley models during 1939. | 30th Jun 1939 | Box 131 \ 3 scan0089 | |
| Blueprint bar chart tracking engine faults and remedies over several months in 1939. | 30th Jun 1939 | Box 131 \ 3 scan0090 | |
| Blueprint bar chart tracking component complaints and failures by month for the year 1939. | 1st Jan 1939 | Box 131 \ 3 scan0091 | |
| Bar chart tracking vehicle fault types and frequencies from January to June 1939. | 30th Jun 1939 | Box 131 \ 3 scan0092 | |
| Bar chart tracking vehicle faults and maintenance for the period of January to June 1939. | 30th Jun 1939 | Box 131 \ 3 scan0093 | |
| Monthly bar chart from 1939 tracking the frequency of various vehicle component faults. | 22th Jun 1939 | Box 131 \ 3 scan0094 | |
| Cover note for a report on outstanding complaints for cars in service. | 22th Jun 1939 | Box 131 \ 3 scan0095 | |
| Strategy for addressing and tracking in-service car troubles. | 22th Jun 1939 | Box 131 \ 3 scan0096 | |
| Engine component issues, specifically worn camshafts, tappets, and sticking rockers on the Phantom III model. | 22th Jun 1939 | Box 131 \ 3 scan0097 | |
| Issues with over-oiling on the Wraith and valve sinkage on Wraith, 25/30 HP, and Bentley models. | 22th Jun 1939 | Box 131 \ 3 scan0098 | |
| Engine overheating issues and Wraith suspension problems. | 22th Jun 1939 | Box 131 \ 3 scan0099 | |
| Weight distribution and diagnosing engine knocks in Phantom III cars. | 22th Jun 1939 | Box 131 \ 3 scan0100 | |
| Idler gear failures for the Phantom III and exhaust manifold joint issues for the Wraith. | 22th Jun 1939 | Box 131 \ 3 scan0101 | |
| Simplification of petrol tank types for future cars. | 5th Jul 1939 | Box 131 \ 3 scan0102 | |
| Standardisation of petrol tanks versus custom variations for different models and markets. | 11th Jul 1939 | Box 131 \ 3 scan0103 | |
| Servicing, stock, and interchangeability of petrol tanks and gauges for various models. | 18th Jul 1939 | Box 131 \ 3 scan0104 | |
| Service troubles report on worn camshafts and tappets for the PH.III engine, detailing alternative solutions. | 18th Jul 1939 | Box 131 \ 3 scan0105 | |
| The running of car 27.G.VI and a detailed investigation into exhaust valve sinkage. | 18th Jul 1939 | Box 131 \ 3 scan0106 | |
| Idler gear failures, brake squeaks, and bumper spring plate issues across different car models. | 18th Jul 1939 | Box 131 \ 3 scan0107 | |
| Cover note for charts detailing complaints about the 4 1/4 Litre Bentley. | 27th Jul 1939 | Box 131 \ 3 scan0108 | |
| Bar chart tracking various engine-related complaints for the 4 1/4 Bentley model during 1939. | 30th Jun 1939 | Box 131 \ 3 scan0109 | |
| Chart tracking engine failures for 3 1/2 and 4 1/4 litre Bentley models. | 30th Jun 1939 | Box 131 \ 3 scan0110 | |
| Fault analysis chart tracking various engine issues over the first six months of 1939. | 30th Jun 1939 | Box 131 \ 3 scan0111 | |
| Monthly failure analysis chart from January to June 1939 for various vehicle components. | 1st Jan 1939 | Box 131 \ 3 scan0112 | |
| Bar chart tracking customer complaints for clutch and brake issues during the first half of 1939. | 1st Jan 1939 | Box 131 \ 3 scan0113 | |
| Bar chart tracking vehicle faults and issues from January to June 1939. | 30th Jun 1939 | Box 131 \ 3 scan0114 | |
| Fault tracking chart for various vehicle components over a six-month period in 1939. | 1st Jan 1939 | Box 131 \ 3 scan0115 | |
| Issues and solutions for the oil supply to non-hydraulic tappets on the Phantom III 'D' series. | 10th Aug 1939 | Box 131 \ 3 scan0116 | |
| Cancellation of the LA modification for drilling rocker shafts on the Phantom III 'DL' Series. | 18th Aug 1939 | Box 131 \ 3 scan0117 | |
| Spline wear on a new type of driving shaft for an 'MR' series rear axle. | 18th Aug 1939 | Box 131 \ 3 scan0118 | |
| Scoring issues with camshafts and tappets on the non-hydraulic 'DL' series Phantom III engine. | 18th Aug 1939 | Box 131 \ 3 scan0119 | |
| Oiling issues and modifications for the Phantom III DL series rocker gear. | 18th Aug 1939 | Box 131 \ 3 scan0120 | |
| Gearbox trouble on a Wraith Chassis WXA-58. | 18th Aug 1939 | Box 131 \ 3 scan0121 | |
| Technical bulletin regarding breakages of Cam balancer springs and detailing the specifications for 20/25 HP and Bentley types. | 22th Aug 1939 | Box 131 \ 3 scan0122 | |
| Investigation into a pronounced engine gear whine on a new Wraith chassis, WHC-40. | 24th Aug 1939 | Box 131 \ 3 scan0123 | |
| Wraith WHC-80 gearbox failure, questioning whether it was due to bad handling or a manufacturing issue. | 24th Aug 1939 | Box 131 \ 3 scan0124 | |
| Analysis of abnormal wear on a returned axle shaft's splines for chassis B.4-MR, concluding the cause is likely faulty fitting. | 25th Aug 1939 | Box 131 \ 3 scan0125 | |
| Recent complaints and faults on Bentley and Wraith cars. | 25th Aug 1939 | Box 131 \ 3 scan0126 | |
| Method to reduce petrol consumption on Bentley vehicles by fitting a special high pressure coil. | 2nd Oct 1939 | Box 131 \ 3 scan0127 | |
| Two complaints about car components, specifically the floorboard and rear number plate brackets. | 8th Aug 1940 | Box 131 \ 3 scan0128 | |
| Outlining four outstanding problems with rationalised cars, regarding the propellor shaft, clutch, gearbox, and steering. | 8th Aug 1940 | Box 131 \ 3 scan0129 | |
| Vehicle issues including propeller shaft vibration, clutch failures, steering shocks, and gearbox rattles. | 9th Sep 1940 | Box 131 \ 3 scan0130 | |
| The fitting of untested experimental parts to a test car and the associated safety implications. | 1st Jan 1937 | Box 131 \ 4 scan0001 | |
| Safety of parts fitted to the 6.B.IV test car for French tests. | 2nd Jan 1937 | Box 131 \ 4 scan0002 | |
| Sending a set of fan blades and a balance weight by air mail with fitting instructions. | 4th Jan 1937 | Box 131 \ 4 scan0003 | |
| Arranging for a driver and other personnel for car 3.B.IV. | 5th Jan 1936 | Box 131 \ 4 scan0004 | |
| Telegraph message reporting a big end failure and that particulars will follow. | 6th Jan 1937 | Box 131 \ 4 scan0005 | |
| Shipment and use of a new variety of EP oil for a back axle in France. | 6th Jan 1937 | Box 131 \ 4 scan0006 | |
| Engagement of a new typist and arrangements for office space and meetings for quarterly complaints. | 7th Jan 1937 | Box 131 \ 4 scan0007 | |
| Adhesion properties of RR.56 bearing metal compared to white metal during the bedding-in of Bentley crankshafts. | 9th Jan 1937 | Box 131 \ 4 scan0008 | |
| Invoicing discrepancies for car garaging and a loaned driver for a Bentley test. | 9th Jan 1937 | Box 131 \ 4 scan0009 | |
| Scheme for extra oil to the push rods on the Phantom III. | 9th Jan 1937 | Box 131 \ 4 scan0010 | |
| Bearing situation in France and its policy implications. | 9th Jan 1937 | Box 131 \ 4 scan0011 | |
| Test report memo on the handling and ride comfort of a specially sprung 25 HP car. | 9th Jan 1937 | Box 131 \ 4 scan0012 | |
| Profit analysis on Bentley sales in France and a related situation in Paris. | 11th Jan 1937 | Box 131 \ 4 scan0013 | |
| Request for details on the torsional stabiliser or rear road springs of a car sprung by Paris. | 11th Jan 1937 | Box 131 \ 4 scan0014 | |
| Complaint about a rattling noise on a Bentley due to a clip falling off the front expansion box. | 11th Jan 1937 | Box 131 \ 4 scan0015 | |
| Complaints regarding the poor enamelling and finish on Bentley 25/30 HP model engines. | 11th Jan 1937 | Box 131 \ 4 scan0016 | |
| Phantom III complaints of low-speed wobbles due to cross steering tube issues. | 11th Jan 1937 | Box 131 \ 4 scan0017 | |
| Complaint of a rattling clip on the Bentley's front expansion box and the proposed solution. | 11th Jan 1937 | Box 131 \ 4 scan0018 | |
| Confirming a modification for a rear lagging clip has been implemented on all production cars. | 18th Jan 1937 | Box 131 \ 4 scan0019 | |
| Message to Hancock in France with instructions to make a phone call. | 18th Jan 1937 | Box 131 \ 4 scan0020 | |
| The dispatch of three sets of Bentley front axle control units. | 22th Jan 1936 | Box 131 \ 4 scan0021 | |
| Usage information for a Bentley Chassis B.137.EJ regarding cylinder bore wear. | 25th Jan 1937 | Box 131 \ 4 scan0022 | |
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