| Description | Date | Identifier | |
| Investigation report into an overheated dynamo from chassis 44-GO owned by Frank Heap. | 4th Dec 1924 | Box 47 \ 4 Scan209 | |
| The investigation of a low output fault on a 20 HP Dynamo, No. 838, from chassis GAK56. | 12th Dec 1924 | Box 47 \ 4 Scan210 | |
| Advice on a customer matter concerning Chassis No. 51-S-4. | 30th Dec 1924 | Box 47 \ 4 Scan211 | |
| Extract from a communication regarding the rapid wear of a dynamo's third brush. | 1st Jan 1925 | Box 47 \ 4 Scan212 | |
| Letter regarding a customer's complaint about a dynamo's control brush wearing out abnormally and requesting its return for analysis. | 1st Jan 1925 | Box 47 \ 4 Scan213 | |
| Letter detailing the return of a dynamo from Chassis No. 51 S4, including a log of its service history. | 7th Jan 1925 | Box 47 \ 4 Scan214 | |
| Chasing the non-receipt of a dynamo from chassis 51-S-4 for failure analysis. | 9th Jan 1925 | Box 47 \ 4 Scan215 | |
| Letter requesting an investigation into the abnormal wear of a dynamo from a 20 HP chassis. | 15th Jan 1925 | Box 47 \ 4 Scan216 | |
| Report summarizing the examination of a 20 HP chassis dynamo, detailing the cause of excessive wear and the proposed corrective actions. | 26th Jan 1925 | Box 47 \ 4 Scan217 | |
| Dynamo returned from chassis 51-S4 due to rapid wear of the brushes. | 26th Jan 1925 | Box 47 \ 4 Scan218 | |
| Repair report for a 20hp Dynamo (No. 21) with an intermittent charging fault. | 14th Sep 1925 | Box 47 \ 4 Scan219 | |
| Instruction to lower the control-brush holder towards the commutator before the machine is put into use. | 15th Sep 1925 | Box 47 \ 4 Scan220 | |
| The fault and repair of a 20 HP Dynamo No. 21. | 15th Sep 1925 | Box 47 \ 4 Scan221 | |
| The return and examination of dynamo No.203 from a 20-HP Chassis GNK-17. | 29th Dec 1925 | Box 47 \ 4 Scan222 | |
| The investigation and repair of a faulty dynamo on chassis No. GNK-17 for customer E.G. Elliott Esq. | 23th Dec 1925 | Box 47 \ 4 Scan223 | |
| Technical report on the failure analysis of a 20 HP Dynamo No. 203. | 31th Dec 1925 | Box 47 \ 4 Scan224 | |
| Dynamo fault, noting a modified control brush plate causing excessive output and recommending a fixed position. | 31th Dec 1925 | Box 47 \ 4 Scan225 | |
| The distribution board and cutout. | 18th Jul 1923 | Box 47 \ 4 Scan226 | |
| Examination of a faulty distribution box and cutout from chassis 49-G-7. | 18th Jul 1923 | Box 47 \ 4 Scan227 | |
| Examination of the cutout on chassis 79-AO and a potential issue with the flexible conductor. | 8th Nov 1923 | Box 47 \ 4 Scan228 | |
| The use of wire from old cables for cut-outs on a 20HP car due to a delivery issue with flexible pigtails. | 3rd Nov 1935 | Box 47 \ 4 Scan229 | |
| Failures in the 20-HP Electric Cutout caused by an improperly spigotted actuating spring. | 22th Dec 1923 | Box 47 \ 4 Scan230 | |
| Investigation into the failures of 20HP electrical cutouts, specifically examining the spring movement and proposing a new die punch for better security. | 10th Jan 1924 | Box 47 \ 4 Scan231 | |
| Request for a report on a failed Distribution Box shunt coil removed from chassis 47-G-O. | 28th Aug 1924 | Box 47 \ 4 Scan232 | |
| Broken shunt coil in a distribution box from chassis 47-GO, asking for instructions on how to proceed. | 1st Sep 1924 | Box 47 \ 4 Scan233 | |
| Request to examine a faulty coil from distribution box no. 83 on chassis 47-G-O to determine the cause of failure. | 2nd Sep 1924 | Box 47 \ 4 Scan234 | |
| Assistant's report on the failure of shunt windings in cutouts from two 20 HP chassis. | 9th Sep 1924 | Box 47 \ 4 Scan235 | |
| Investigation into the failure of cutouts in distribution boxes 83 and 717 due to open circuited shunt windings. | 8th Sep 1924 | Box 47 \ 4 Scan236 | |
| Title page for a document section on fuses. | 4th Oct 1923 | Box 47 \ 4 Scan237 | |
| Replacement and testing of dynamo field circuit fuses on specific chassis. | 4th Oct 1923 | Box 47 \ 4 Scan238 | |
| Title page for a document about a switchbox. | 30th Aug 1923 | Box 47 \ 4 Scan239 | |
| From PN to Hs requesting a fault report for a 20 HP switch-box belonging to 46-G9. | 30th Aug 1923 | Box 47 \ 4 Scan240 | |
| From EFC to PN regarding the examination and rectification of a faulty switchbox from car 46-G9. | 30th Aug 1923 | Box 47 \ 4 Scan241 | |
| Replying to a query about a faulty switch-box taken from car 46.G.9. | 31th Aug 1923 | Box 47 \ 4 Scan242 | |
| Report and replacement for a switch removed from a 20-HP Chassis. | 15th Sep 1923 | Box 47 \ 4 Scan243 | |
| Report on a switchbox taken from vehicle 46-G9 and its return. | 17th Sep 1923 | Box 47 \ 4 Scan244 | |
| Title page for a document about the starter motor. | 17th Aug 1923 | Box 47 \ 4 Scan245 | |
| Failure of a 20-HP starter motor due to loose screws and poor brush fitting. | 17th Aug 1923 | Box 47 \ 4 Scan246 | |
| Investigation into the failure of a 20 HP starter motor caused by a loose screw. | 22th Aug 1923 | Box 47 \ 4 Scan247 | |
| Faulty starter motor from chassis 76-A-2. | 10th Oct 1923 | Box 47 \ 4 Scan248 | |
| Material analysis of a broken washer from a returned motor and the plan for replacement. | 11th Oct 1923 | Box 47 \ 4 Scan249 | |
| Starter motor failures and the fitting of a three-washer scheme. | 7th Jul 1924 | Box 47 \ 4 Scan250 | |
| Query regarding a burnt valve on chassis G.F.54, noted as the first case with 45° angle seating. | 8th Sep 1924 | Box 47 \ 5 Scan001 | |
| The handover of a propeller shaft with a modified lubricating scheme for chassis G.A.K. 63. | 13th Nov 1924 | Box 47 \ 5 Scan002 | |
| Clarifying that the instrument board on a 20-HP chassis should be rigidly fixed to the scuttle rail. | 17th Feb 1925 | Box 47 \ 5 Scan003 | |
| Complaint regarding a floating instrument board on chassis GRK.51, with a recommendation to attach it to the scuttle. | 12th Feb 1925 | Box 47 \ 5 Scan004 | |
| Squeaking butterfly valve spindle in the exhaust pipe of Chassis No.4-TM. | 28th Mar 1925 | Box 47 \ 5 Scan005 | |
| The causes and prevention of fumes and smells entering the car body of a 20-HP car. | 21th May 1925 | Box 47 \ 5 Scan006 | |
| The remedy for fumes entering a car via efficient ventilation. | 21th May 1925 | Box 47 \ 5 Scan007 | |
| Correspondence regarding the rectification of bad smells in a car body caused by faulty carburation and gaps in the floorboards. | 29th May 1925 | Box 47 \ 5 Scan008 | |
| Customer complaint about engine fumes entering the car's cabin. | 28th May 1925 | Box 47 \ 5 Scan009 | |
| Customer complaint about fumes and draughts, suggesting test drives and alternative ventilation solutions. | 28th May 1925 | Box 47 \ 5 Scan010 | |
| Chassis GA-17, advising not to charge the customer as the car is still under guarantee. | 7th Sep 1925 | Box 47 \ 5 Scan011 | |
| Fracture on an inlet pipe flange for chassis GF-80, attributing the failure to a weak design. | 1st Sep 1925 | Box 47 \ 5 Scan012 | |
| Customer's steering complaint and the various unsuccessful attempts to rectify the issue. | 21th Sep 1925 | Box 47 \ 5 Scan013 | |
| 20 HP steering complaint, comparing axle configurations and considering lower geared steering. | 1st Sep 1925 | Box 47 \ 5 Scan014 | |
| Modifications to the 20 HP steering system to reduce road shocks. | 1st Oct 1925 | Box 47 \ 5 Scan015 | |
| The testing of steering design proposals for a 20 HP chassis GDK.49. | 9th Oct 1925 | Box 47 \ 5 Scan016 | |
| Forwarding correspondence regarding steering trouble on chassis GMK.49. | 12th Nov 1925 | Box 47 \ 5 Scan017 | |
| Customer complaint case for Chassis No. GMK 49. | 11th Nov 1925 | Box 47 \ 5 Scan018 | |
| Development and testing timeline for a new 20 HP steering system. | 13th Nov 1925 | Box 47 \ 5 Scan019 | |
| Development and testing of a new steering column for a 20 HP, chassis GMK.49. | 13th Nov 1925 | Box 47 \ 5 Scan020 | |
| Customer feedback and potential design improvements for the 20 HP chassis. | 18th Nov 1925 | Box 47 \ 5 Scan021 | |
| Criticisms of chassis features and questioning the reasons behind certain design choices compared to alternatives. | 18th Nov 1925 | Box 47 \ 5 Scan022 | |
| Replying to criticisms of the 20 HP chassis, comparing brakes, oil filter, and lubrication. | 23th Nov 1925 | Box 47 \ 5 Scan023 | |
| Petrol system trouble on chassis GRK.43, potentially caused by an air lock. | 4th Dec 1925 | Box 47 \ 5 Scan024 | |
| Engine bearing knocks on a 20-HP chassis, advising the car be returned to the Works for investigation. | 18th Dec 1925 | Box 47 \ 5 Scan025 | |
| List of complaints and internal notes regarding a 20 HP chassis. | 1st Oct 1925 | Box 47 \ 5 Scan026 | |
| List of technical issues and considerations for a vehicle, including noise, vibration, and leaks. | 6th Oct 1925 | Box 47 \ 5 Scan027 | |
| List of reported faults and issues with vehicle components, numbered 15 to 23. | 6th Oct 1925 | Box 47 \ 5 Scan028 | |
| Test report page detailing various vehicle issues and proposed actions or considerations. | 3rd Feb 1926 | Box 47 \ 5 Scan029 | |
| Inspection memorandum concerning a test on an Enots Gun which caused support brackets to bend, and a proposed solution. | 3rd Feb 1926 | Box 47 \ 5 Scan030 | |
| Customer complaint about a steering wobble on chassis GSK-76. | 12th Mar 1926 | Box 47 \ 5 Scan031 | |
| Investigating a slow speed wobble and rattle on chassis G.H. 61. | 26th Feb 1926 | Box 47 \ 5 Scan032 | |
| Request for a report regarding a letter received from a 20 HP car owner. | 16th Mar 1926 | Box 47 \ 5 Scan033 | |
| Customer letter of complaint regarding a recurring grease leak from the pump spindle on a 20 HP car. | 19th Mar 1926 | Box 47 \ 5 Scan034 | |
| Response to a complaint from Mr. Sutcliffe Pyman regarding a 20 HP car (GLK.66), suggesting the water pump gland issue is due to over-lubrication. | 19th Mar 1926 | Box 47 \ 5 Scan035 | |
| Customer complaints about a 'wobble' on two chassis and potential solutions. | 23th Mar 1926 | Box 47 \ 5 Scan036 | |
| Customer complaints of low-speed steering wobble on 20-HP cars. | 22th Mar 1926 | Box 47 \ 5 Scan037 | |
| Investigation into a low-speed steering wobble on the 20-HP chassis. | 20th Mar 1926 | Box 47 \ 5 Scan038 | |
| Extract from a customer complaint letter regarding serious defects in a new car. | 21th Mar 1926 | Box 47 \ 5 Scan039 | |
| Customer complaint about wheel wobble on chassis GPK-43. | 19th Mar 1926 | Box 47 \ 5 Scan040 | |
| Resolving a low-speed steering wobble with a new friction device being tested on an experimental car. | 23th Mar 1926 | Box 47 \ 5 Scan041 | |
| Diagnosis and resolution of a steering wobble on Chassis GCK-3. | 26th Mar 1926 | Box 47 \ 5 Scan042 | |
| Resolution of a low-speed steering wobble on chassis GCK-17, the Madrid Show car. | 24th Mar 1926 | Box 47 \ 5 Scan043 | |
| Resolving a low-speed steering wobble issue on chassis GCK-24. | 24th Mar 1926 | Box 47 \ 5 Scan044 | |
| The issue of rear spring to axle clips working loose on a 20-HP vehicle. | 26th Mar 1926 | Box 47 \ 5 Scan045 | |
| Customer complaint of motion transmitted to the steering wheel on chassis GMK.49. | 30th Mar 1926 | Box 47 \ 5 Scan046 | |
| Parts for fitting a Friction Device to the pivots of chassis GSK.76. | 29th Mar 1926 | Box 47 \ 5 Scan047 | |
| The arrangement to fit a new damping scheme to a 20-HP car, GPK-44, to cure steering wobble, with work delayed by a strike. | 11th May 1926 | Box 47 \ 5 Scan048 | |
| Preparation of parts for the 20-HP steering system on car GPK-44 for Heath Trials. | 13th May 1926 | Box 47 \ 5 Scan049 | |
| Parts delay for a new damping scheme on a 20 HP Chassis, GPK.44, during Heaths Trials. | 17th May 1926 | Box 47 \ 5 Scan050 | |
| Test report on demonstration car chassis GOK-27, detailing various mechanical issues and suggestions for improvement. | 21th May 1926 | Box 47 \ 5 Scan051 | |
| Continuation memo regarding alterations to be carried out on chassis GOK-27 before delivery. | 22th May 1926 | Box 47 \ 5 Scan052 | |
| Steering on the GOK-27 demonstration car and fitting a new friction device. | 22th May 1926 | Box 47 \ 5 Scan053 | |
| Status of Chassis GOK/27 for Edwards of Bournemouth, referencing a previous memo and requesting an update. | 27th May 1926 | Box 47 \ 5 Scan054 | |
| Sending a man to fit a new type friction device to the steering on Chassis No. GCK-27. | 31th May 1926 | Box 47 \ 5 Scan055 | |
| Letter from the Maintenance Manager regarding a seized steering column and an engine rumble on a customer's car. | 7th Jun 1926 | Box 47 \ 5 Scan056 | |
| Steering seizure issue and potential causes like lack of lubrication or incorrect fitting. | 21th May 1926 | Box 47 \ 5 Scan057 | |
| Letter from Rolls-Royce of America to London concerning a seized steering box on a customer's car and the associated rectification costs. | 5th May 1926 | Box 47 \ 5 Scan058 | |
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