Page 26
25-20-00
Martin-Baker
MB680
MISSION SEAT ETSO
MAINTENANCE MANUAL
The 5-point harness
has a total life of fifteen (15) years and an installed life of twelve (12) years. It will be
replaced ‘on condition’ or when its life has expired regardless of condition, to protect against Ultra-Violet
(UV) degradation.
The seat requires no periodic overhaul to maintain reliability. The seat can be maintained ‘on condition’
with restoration only required when faults are identified.
Maintenance of the Martin-Baker seats and associated equipment should be confined to those tasks de-
tailed in the maintenance manuals. Where possible, maintenance should be performed in a clean and dry
area. Care should be taken to protect the parts from damage, exposure to moisture and to prevent damage
by personnel, tools, water, oil and grease.
The maintenance operations used throughout the maintenance manuals have the meaning given in the
Webster’s Dictionary EXCEPT for those listed in the following sequence. Reference should be made to
this list as necessary to establish the correct procedure to be followed where these terms are used in the
text.
(1) Examine - Carry out a survey of the condition of an item. For example the condition of an item can
be impaired by one or more of the items that follow:
(a) Insecurity of attachment
(b) Cracks or fractures
(c) Corrosion, deterioration or contamination
(d) Distortion
(e) Loose or missing rivets
(f) Chafing, fraying, scoring or wear
(g) Faulty or broken locking devices
(h) External damage
(i) Discolouration due to overheating or leaking fluids.
(2) Do an inspection - Review the work carried out by tradesmen to make sure it has been performed
satisfactorily.
(3) Do a check - Make sure an item or system operates correctly as far as possible without the use of
test equipment or reference to measurement.
(4) Do a test - Make sure that by using the correct test equipment a component or system functions
correctly.
(5) Install - Correctly attach one item to another.
(6) Replace - Remove an item and fit a new or maintained item.
(7) Disconnect - Uncouple or detach cable, pipelines or controls.
(8) Connect - Reverse of disconnect.
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