AIRCRAFT HANDLING Part 1 Maintenance

P C policy Policy & Objectives reventative orrective The RAF’s maintenance policy is based on a finely judged balance, of preventative and corrective maintenance. P C reventative orrective policy

Policy & Objectives ‘maintenance’ and ‘operational’. A policy aimed too much at preventing breakdowns (over maintenance) would keep the aircraft in the hangar most of the time. So the objectives of the RAF’s maintenance organisation are in 2 main categories: ‘maintenance’ and ‘operational’.

Policy & Objectives Operational Objectives: To generate the aircraft & equipment to counter surprise attack. To support intensive flying over a sustained period in NBC or other hostile environments. To generate aircraft and equipment required for NATO & national commitments. To satisfy such contingency plans as may be ordered by a higher authority. The efficient provision of serviceable aircraft and equipment needed for peace time tasks.

Policy & Objectives Maintenance Objectives: Minimise costs (manpower & resources) Minimise faults that would be hazardous to an aircraft or affect it’s operational capabilities, or would require expensive repair. Find ever-better ways of improving reliability and maintainability.

Types of Maintenance Let’s examine types of maintenance utilised by the RAF: The aim of Preventive Maintenance is to reduce the probability of failures, and ensure that performance of aircraft and equipment is maintained. It attempts to stop faults occurring.

Preventative Maintenance Preventive Maintenance covers four main headings – Servicing Scheduled Maintenance Condition-based Maintenance Out-of-Phase Maintenance Let’s look at each one of them . . . .

Preventative Maintenance Preventive Maintenance covers four main headings – Servicing (or ‘flight servicing’ when applied to aircraft) is the maintenance needed after a period of use, e.g. a flight, plus preparation for the next period of use.

Preventative Maintenance Preventive Maintenance covers four main headings – Scheduled Maintenance Is regular maintenance to – Keep the aircraft in a sound overall condition. Minimise random faults. Minimise the amount of routine day-to-day attention needed.

Preventative Maintenance Preventive Maintenance covers four main headings – Condition-based Maintenance Some aircraft parts are continuously monitored using non-destructive testing (NDT) e.g. X-rays or Spectrum Oil Analyzed Particles techniques (SOAP) until a condition that needs attention is revealed.

Preventative Maintenance Preventive Maintenance covers four main headings – Out-of-Phase Maintenance Is scheduled or condition-based maintenance that does not fit the overall maintenance cycle.

Types of Maintenance Corrective Maintenance Contingency Maintenance As well as Preventive Maintenance there are three other area of maintenance we must look at – Corrective Maintenance Contingency Maintenance Modifications

Types of Maintenance Corrective Maintenance As well as Preventive Maintenance there are three other area of maintenance we must look at – Corrective Maintenance is carried out as and when a fault occurs. It is not scheduled or planned for, as the faults can occur at random.

Types of Maintenance Contingency Maintenance As well as Preventive Maintenance there are three other area of maintenance we must look at – Contingency Maintenance In operational theatres it may be necessary to relax maintenance standards, suspending scheduled and condition-based maintenance in favour of relying on corrective maintenance which varies between aircraft.

Types of Maintenance Modifications As well as Preventive Maintenance there are three other area of maintenance we must look at – Modifications are made to remedy any design faults that come to light, or to incorporate new technology designed to improve performance or safety.

Maintenance Records Aircraft Maintenance Data Log: Every aircraft has an Aircraft Maintenance Data Log: An MOD Form 700 The F700 is actually a series of forms; MOD Form 701 fuel and oil types, tyre pressures. MOD Form 703 onboard software log. MOD Form 705 flight servicing & fuel certificate. MOD Form 725 flying log & fatigue data sheet. MOD Form 725A air-to-air in flight refuelling.

Maintenance Records The F700 details are also recorded on the Maintenance Data System (MDS). concentrating on 6 main aspect of data – Faults – Defects – Modifications Manpower Utilisations Task Achievement Technical Costs & Logistics These are all available to RAF Stations, Groups and Commands via the MOD Intranet or disk. This enables performance monitoring and life span predictions for aircraft.

Check Understanding The RAF’s maintenance policy is based on a finely judged balance of measures, they are known as: Preventative and Operational Operational and Corrective Corrective and Permanent Preventative and Corrective

Check Understanding Keep the aircraft in the hangar most of the time. A policy of over-maintenance would: Keep the aircraft in the hangar most of the time. Ensure that aircraft were never in the hangar. Ensure that the aircraft were always serviceable. Generate the aircraft to counter a surprise attack.

Check Understanding What is maintenance aimed to reduce the probability of failures, restore levels of reliability, and ensure that time and use do not affect aircraft performance called? Phased Maintenance Corrective Maintenance Preventative Maintenance Scheduled Maintenance

Check Understanding Operational Maintenance Preventative Maintenance Servicing, scheduled maintenance, condition-based maintenance and out-of-phase maintenance are all types of: Operational Maintenance Preventative Maintenance Corrective Maintenance Contingency Maintenance

Check Understanding Scheduled Maintenance Conditioned Maintenance Maintenance performed after aircraft use, and in preparation for the next flight, is called what? Scheduled Maintenance Conditioned Maintenance Flight Servicing Out-of Phase Maintenance

Check Understanding Keeping an aircraft in sound overall condition, minimising random faults and the amount of routine day-to-day attention needed are all aims of: Modification Contingency Maintenance Condition-based Maintenance Scheduled Maintenance

Check Understanding Out-of-Phase Maintenance The use of NDT and SOAP are elements of what? Out-of-Phase Maintenance Condition-based Maintenance Corrective Maintenance Contingency Maintenance

Check Understanding Modifications Contingency Maintenance Scheduled or condition-based maintenance which is needed at intervals that do not fit the maintenance cycle are called what? Modifications Contingency Maintenance Out-of Phase Maintenance Condition-based Maintenance

Aircraft Maintenance Data Form Check Understanding What is the Aircraft Maintenance Data Form called? MOD Form 700 MOD Form 7000 MOD Form 750 MOD Form 7500

AIRCRAFT HANDLING End of Presentation