Special Inspections - Wing & Strut Bush Service - Jabiru j160 Technical Manual

Aircraft Technical Manual
JTM001-5
Special Inspections – Wing & Strut Bush Service (all J-Series)
5.22
Required Tools:
Parts and Material:
Type of Maintenance:
Level of Certification:
Return to Service:

As a part of daily and maintenance inspections the aircraft is gripped by each wingtip and shaken to
check for any free-play in the wing or strut attachment points (Section 5.12). The procedure below
details how free-play is corrected once detected.

As detailed below there can be several different ways to correct free-play in these connections. It is
recommended that maintainers who have not carried out this task before contact Jabiru Aircraft (or
our local representative) for advice before continuing.

Free-play can develop in any of the wing or strut attachments though it most commonly occurs in the
front wing attachment. To determine which connection requires attention:
- Remove the wing root fairing from the aircraft to expose the attachments between the wing and
the fuselage.
- Have an assistant shake the wing tip. While the wing is being shaken place a finger on each
attachment in turn to feel which requires servicing. A mechanic's stethoscope may also be used.
In rare cases both attachments may have free-play.
- If no movement is apparent in the wing attachments remove the fairings from the top and bottom
of the wing strut and repeat the process: have someone shake the wing while holding each
attachment to feel for movement.

The bolt fitted to a connection found to have free-play must be replaced.

If a wing-fuselage attachment requires service the wing can be removed completely as detailed in
Section 0 or placed on stands as follows:
- This procedure method is suitable for aircraft with dry wings (no wing fuel tanks) and those with a
minimum of 75mm (3") free-play in all connections between the wing and fuselage (fuel lines,
aileron and electrical cables etc).
- For aircraft equipped with fuel sight gauges inside the cabin this procedure will normally not be
suitable as the short fuel hoses from the wing to the sight gauges do not have sufficient free
length.
- Two adjustable wing stands are required for this procedure.
- Remove the wing root and wing strut fairings (both top and bottom).
Place the two stands under the wing – one located inboard close to the fuselage and the other
-
positioned around 1m (3ft) inboard from the tip.
- Adjust the outboard stand so that it is just clear of the underside of the wing.
- Remove the wing strut from the aircraft as detailed in Section 6.19.1. The strut is removed
completely to clear the work area and reduce the chance of over-stressing any attachment
points.
- Rest the wing on the outboard wing stand.
This document is controlled while it remains on the Jabiru server. Once this no longer applies the document becomes uncontrolled.
ISSUE 1 2 3
Jabiru Aircraft
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
Mechanic's stethoscope (can be helpful)
-
- Wing stands
- Soft hammer or similar
- Die grinder drill, sandpaper (if lug replacement necessary)
- UNC thread tap
- Soldering iron or similar
- Replacement bolts (if required)
- Replacement Lug fittings (if required)
- Acetone, Resin and Flock (if lug replacement is necessary)
- Etch primer, corrosion inhibitor (if strut lugs are replaced)
- Stainless steel bush (if replacement is required)
Line Maintenance, Heavy Maintenance (if free play detected)
L2 or LAME (A&P or LSA Repairman / Maintenance)
L2 or LAME (A&P or LSA Repairman / Maintenance)
4 5 Dated: 29th October 2014
Pty Ltd
Issued By: AS Page: 71 of 298