Maintenance Manual STEMME S10-VT
Date of Issue: Jan. 01, 1998
Page 7-14
Amendment Nr. 14
Date: Nov. 30. 2007
A4011121_B23.doc
Doc. No. A40-11-121
7.4.4.2 Air filter
Additionally to instructions in "Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series”
check condition and tight fit of air hose assy between turbocharger inlet and filter, including composite sealing
plate.
See "Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series”, section 12
-00,
subsection 2.5, (Annex E)
7.4.5 Exhaust System
System description
See section 3.4.5
7.4.5.1 Turbocharger / Muffler Mountings
Check tight fit of screw connections of the mounting struts, on engine housing and turbocharger/muffler side,
and tight fit of turbine-compressor and turbine-muffler screw connections. Check tight fit of the clamp
supporting the muffler. Check condition of struts (cracks, specially close to welding seams, corrosion, e.g.
from chafing). Check proper position of turbocharger unit (clearance of exhaust bends to fuselage steel
frame, specially cross-strut below engine).
7.4.5.2 Exhaust bends
Remove heat insulation tape. Visually check condition of bends (deformation and cracks, specially
connecting ends with spring supports and flanges). Check condition of screw connections on engine and
manifold (Nuts M8, tightening torque 20 Nm / 14.7 lbf ft) with cold engine. Check condition of springs and
proper overlapping of connecting ends of the exhaust bends (min. 5 mm / 0.2 in.). Check condition of support
plate on lower engine mounting frame below engine, and tight connection of bend to the support plate.
7.4.5.3 Heat Insulation
Check of Heat Insulation Tape on Exhaust Bends
Check condition of glass-fibre heat insulation tape on exhaust bends, specially close to spring clamps.
Renew if fibre tape is brittle (fibres fall off when touched), holey or fray. Check condition of spring clamps.
Renewal of Heat Insulation Tape
If required or at the latest after maximum 100 engine hours the heat insulation tape (type see section 3.4.5,
available from STEMME) must be renewed:
remove spring clamps and insulation tape
Fix beginning of new tape by means of a suitable glue
wind new tape round the exhaust bend with an overlapping of approx. 50% with some tension.
fasten tape ends by means of the spring clamps. The bends of Cyl. 1 and 2 have an additional clamp half
the tube length.
Check of Muffler Heat Insulation
Check condition of insulation cover and its fastening fittings. Check tight fit of springs and condition of
securing wire to connect end wall insulation. Renew insulation if surface of cover is brittle or if fittings are
loose (type see section 3.4.5, available from STEMME).
Renewal of Muffler Heat Insulation
remove upper heat protection steel sheet (M5 screw)
remove end wall insulation (cut off securing wire)
remove springs on muffler heat insulation
remove muffler insulation to the back
re-assemble with new insulation in opposite order
Heat Protection Shields
Check condition (cracks, deformation) of the heat protection shields (stainless steel). Check condition and
tight fit of fastening elements (clamps, screws).
