85-40-40 Check of timing chain
85-40-41 Preparations prior check of timing chain
Engine configuration “–A”
Expose the engine according to aircraft maintenance instructions (AMM) to allow access to the chain
tensioner of the engine.
Engine configuration “–B” or “–C”
Expose the engine according to aircraft maintenance instructions (AMM). After the cowling parts have
been removed the engine is exposed as shown in figure below. To proceed, aircraft and engine parts
must be removed as follows:
Fig. 85 - 97 Engine overview after cowling was removed (e.g. DA 42 installation)
• Remove all coolant of the engine. For detailed information see applicable AMM.
• Remove the air tube (No. 01 at figure above) connected to the intake air manifold. For
detailed information see applicable AMM.
• Remove the expansion tank for coolant (No. 02 at figure above). For detailed information see
applicable AMM.
• Loosen the intake air manifold (No. 03 at figure above). Move the manifold until the chain
tensioner (No. 04 at Figure 85-68) is exposed and can be removed. For detailed information
see applicable engine MM.
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