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Aviation History
1955
1955 - 1142.PDF
256 FLIGHT, 19 August 1955 Pictorial Maintenance Schedule ENGINEERS of Field Aircraft Services, Ltd., have developeda "pictorial maintenance schedule" for the Hunting ClanViscounts which they maintain at their new base at London Airport. The chief advantages claimed for the system are that itleads to more thorough inspection by telling the engineers quickly and clearly where the parts to be inspected are located in the air-craft, and by explaining concisely what should be done to them. It also eliminates the repetitions and complications of the con-ventional written work sheets and manuals, thus saving much paperwork. A group of 70 pictorial charts covers the whole of the Viscount and all its systems, and each chart is annotated with a series ofabbreviated instructions coupled with the number of the check during which they have to be carried out. Master charts arebound in books and enlarged copies are held in a special desk in the hangar for reference during work. During each check the inspector signs for a chart at a timeon sheets made out for this purpose. For a Check 4, for example, there would be five sheets, one for the 59 airframe charts, one foreach engine and one for the charts covering electrics. Functional checks required for each component are listed in anappendix to the charts which is covered by a comprehensive index. Also detailed are the minimum number of cover plates andpanels which have to be removed for any particular check. Work can be carried out solely by consulting the charts and without theuse of work-sheets. The new system has been approved by the A.R.B. The pictorial maintenance schedule has been fairly costly toproduce, but Field Aircraft Services, Ltd., can make it available to other operators on a service-rental basis, under which arrange-ment Fields would be responsible for all modifications and sheet replacements when necessary. Various methods and degrees of illustration have been triedbefore, but this is the first time that a manual has been entirely pictorial. The increases in speed, accuracy and thoroughnessin routine maintenance which result are a real step towards simplifying and speeding up the task of inspecting aircraft ofincreasing size and complexity. Pictorial instructions tor lubrication of components in the engine nacelle (left) indicate the types of oil or grease by the shape of the marks, and the use of a grease-gun by an appropriate silhouette. The chart below covers the air-conditioning system, the inspections to be made at various checks being indicated by standardized abbreviations in the boxes around the edge of the chart. DE-wrariNO DUCTSAND LOUVRES 1 1! A III IV DE-M 1 A STER BIO*ER F.235g9 l[ A III A,% IV A.B.C PILOTS FOOTWARMER ASSEMBLY V-^TMSS SHEET H-3* I A II A 111 AB IV A.B.C UPHOLSTERY REMOVAL 1 II Ml IV A.B.C COMPRESSOR GODf RET TYPE IS 1 A 11 A III A.B IV A.B.C NOT E CEED'NG TWO CHECK IV* REMOVE COMPRESSORS FOR COMPRESSOR OIL FILTER ELEMENT 1 II III A.B.C IV A.B.C VICKERS VISCOUNT 732 MAINTENANCE SCHEDULE PRIMARY SILENCERS V.B601 1 II A 111 A IV A.B.C REMOVE FOR CLEANING AND A.B.C INSPECTION INWARDS RELIEF VALVE 70155 SHEET 5S I II III A.B IV A.B.C NOT EXCEEDING FOUR CHECK IV'i REMOVE VALVE FOR OVER- HAUL INDIVIDUAL *W SUPPLY LOUVRES 1 II Ml AS IV A.8.C SKIST DUCTING IN FUSELAGE "CHECK IV- SECTION SPECIFIED BY A.fi.8. SURVEYOR TO BE REMOVED f ORA.B.-: INSPECTION SYSTEM DUCTINGANDEXPAMSION IENEATH FLOOR 1 H A III A.B IV A.B.C NOT EXCEEDING THREE CHECK IV'i REMOVE VALVE FOR OVER- HAUL INTERCOOL, BY-PASS AND REFRIGERATOR VALVES AND OPERATING MECHANISM 1 II A HI A.B IV A.8.C HEAT EXCHANGE STRUCTURE-M. 1 H A RAND SUPPORT .L.91-3A A IV A.B.C NOT EXCEEDING THREE CHECK IV'i REMOVE HEAT EXCHANGER FOR OVERHAUL AIR OUTLETS TO UNDERFLOW 1 tl A III A.B tv A.B.C ENSURE UNOBSTRUCTED VENTILATING FAN 0.M1SI r ii HI IV UNPPES5URIZED FLIGHT VALVE 7Z4SJ WEFT 1?6 1 A II A III A.B IV A.B.C NOT EXCEEDING E'GHT CHECK IV'i REMOVE VALVI FOR OVER- HAUL IV'i'REMOVE SILENCERS FOB CLEANING AND A.B.C INSPECTION LEVEL Of GEAR BOX. NOT EXCEEDING TWO CHECK IV. REMOVE UNIT FOB OVERHAUL AIR CONDITIONING SYSTEM SHEET No.61
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