Aircraft Technical Manual
Jabiru Aircraft
Pty Ltd
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
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ISSUE
1
2
3
4
5
Dated: 29th October 2014
Issued By: AS
Page: 58 of 298
5.18 Special Inspections
– Control Surfaces (all J-Series)
Required Tools:
-
Steel rule, Vernier or Gauges
-
Calibrated scales
-
Marker pen
Parts and Material:
N/A
Type of Maintenance:
Line Maintenance
Level of Certification:
L1, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
Return to Service:
L2, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
The following set of inspections have been developed to address potential control surface jamming.
These inspections are to be carried out at the frequency defined in the inspection chart of Section
5.4. In addition they must be repeated at any time when the control rigging may have been altered
–
i.e. if a control is removed, repaired or adjusted.
If the inspection shows that the aircraft requires adjustment Jabiru Aircraft or our local representative
must be consulted for an appropriate rectification method.
In Figure 17 several terms are defined. This is provided to clarify the statements given in the
remainder of this inspection.
Control
– This refers to control surfaces – rudder, elevator and ailerons.
Aircraft
– This refers to the fixed part of the aircraft immediately in front of the controls. In particular
it refers to the point indicated in Figure 17, where the control will hit the aircraft if a jam occurs.
Control at the point of overlap
– This is the particular point where the rearmost edge of the aircraft
is aligned with the front of the non-hinged side of the control. This is the critical point where a control
jam becomes possible. Any control which has a critical overlap of less than 2mm should also be
treated as having a “point of overlap” as defined by this bulletin.
Control clearance
– This is the working clearance between the control & the aircraft.
Control gap
– Best shown on Figure 19 (left). If the control passes the point of overlap a gap opens
between the aircraft and the control. A gap like this combined with excess flexing of the control
surface hinges will lead to control surface jamming.
