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. previous experience of maintenance errors, depending on the consequences of the failure. . information arising from an ‘occurrence reporting system’
When checking control systems that have undergone maintenance the person signing the maintenance release and the person performing the independent check should consider the following points independently:
. all those parts of the system that have actually been disconnected or disturbed should be inspected for correct assembly and locking. . the system as a whole should be inspected for full and free movement over the
complete range. . cables should be tensioned correctly with adequate clearance at secondary stops. . the operation of the control system as a whole should be observed to ensure that
the controls are operating in the correct sense.
. if the control system is duplicated to provide redundancy, each system should be checked separately. if different control systems are interconnected so that they affect each other, all the interactions should be checked through the full range of the applicable controls.
AMC M.402 (b) Performance of maintenance
When performing maintenance, personnel are required to use the tools, equipment and test apparatus necessary to ensure completion of work in accordance with accepted maintenance and inspection standards. Inspection, service or calibration on a regular basis should be in accordance with the equipment manufacturers’ instructions. All tools requiring calibration should be traceable to an acceptable standard.
In this context officially recognised standard means those standards established or published by an official body whether having legal personality or not, which are widely recognised by the air transport sector as constituting good practice.
If the organisation responsible for the type design involved recommends special equipment or test apparatus, personnel should use the recommended equipment or apparatus or equivalent equipment accepted by CAD.
All work should be performed using materials of such quality and in a manner, that the condition of the aircraft or its components after maintenance will be at least equal to its original or modified condition (with regard to aerodynamic function, structural strength, resistance to vibration, deterioration and any other qualities affecting airworthiness).
AMC M.402 (d) Performance of maintenance
The working environment should be appropriate for the maintenance task being performed such that the effectiveness of personnel is not impaired.
(a)
Temperature should be maintained such that personnel can perform the required tasks without undue discomfort.
(b)
Airborne contamination (e.g. dust, precipitation, paint particles, filings) should be kept to
a minimum to ensure aircraft/components surfaces are not contaminated, if this is not possible all susceptible systems should be sealed until acceptable conditions are re- established.
(c)
Lighting should be adequate to ensure each inspection and maintenance task can be performed effectively.
(d)
Noise levels should not be allowed to rise to the level of distraction for inspection staff or if this is not possible inspection staff should be provided with personnel equipment to reduce excessive noise.
AMC M.402 (e) Performance of maintenance
Facilities should be provided appropriate for all planned maintenance. This may require aircraft hangars that are both available and large enough for the planned maintenance. Aircraft component workshops should be large enough to accommodate the components that are planned to be maintained.
Protection from inclement weather means the hangar or component workshop structures should be to a standard that prevents the ingress of rain, hail, ice, snow, wind and dust etc.
AMC M.403 (b) Aircraft defects
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