opposition wire is too tight, in which case
slacken it, and possibly you will find that will tighten the slack wire.

Carefully examine all wires and their connections near the propeller,
and be sure that they are snaked round with safety wire, so that the
latter may keep them out of the way of the propeller if they come
adrift.

The wires inside the fuselage should be cleaned and regreased about once
a fortnight.

STRUTS AND SOCKETS.--These should be carefully examined to see if any
splitting has occurred.

DISTORTION.--Carefully examine all surfaces, including the controlling
surfaces, to see whether any distortion has occurred. If distortion can
be corrected by the adjustment of wires, well and good; but if not, then
some of the internal framework probably requires replacement.

ADJUSTMENTS.--Verify the angles of incidence; dihedral, and stagger, and
the rigging position of the controlling-surfaces, as often as possible.

UNDERCARRIAGE.--Constantly examine the alignment and fittings of the
undercarriage, and the condition of tyres and shock absorbers. The
latter, when made of rubber, wear quickest underneath. Inspect axles and
skids to see if there are any signs of them becoming bent. The wheels
should be taken off occasionally and greased.

LOCKING ARRANGEMENTS.--Constantly inspect the locking arrangements of
turnbuckles, bolts, etc. Pay particular attention to the control cable
connections, and to all moving parts in respect of the controls.

LUBRICATION.--Keep all moving parts, such as pulleys, control levers,
and hinges of controlling surfaces, well greased.

SPECIAL INSPECTION.--Apart from constantly examining the aeroplane with
reference to the above points I have made, I think that, in the case of
an aeroplane in constant use it is an excellent thing to make a special
inspection of every part, say once a week. This will take from two to
three hours, according to the type of aeroplane. In order to carry it
out methodically, the rigger should have a list of every part down to
the smallest split-pin. He can then check the parts as he examines them,
and nothing will be passed over. This, I know from experience, greatly
increases the confidence of the pilot, and tends to produce good work in
the air.

WINDY WEATHER.--The aeroplane, when on the ground, should face the
wind; and it is advisable to lash the control lever fast, so that the
controlling surfaces may not be blown about and poss