Type Of Service Bulletin: Mandatory
Aircraft Affected: DA 40: 40.006 - 40.0079, 40.081 -
40.083, 40.201 and subsequent models Time of Compliance: within the next 15 hours and
at every 50 hour inspection Subject: Exhaust System ATA-Code: 78-10, Exhaust Reason: Cracks at the flanges of the exhaust
system riser Reference: DA 40 Airplane Maintenance Manual
(AMM), Doc.No. 6.02.01 Measures: It is required to perform a thorough
visual inspection of the exhaust system. The inspection should
include inspection of all attachment hardware for security,
inspection of all clamps for security, visual inspection of the
entire exhaust system, with particular focus on the exhaust risers
in the area below the flange that attaches the system to the
cylinder. Use of a flashlight and magnifying glass is recommended.
Check ears of each clamp half for a clearance of 0.10 - 0.13
inches. Defective components must be repaired or replaced before
next flight. Caution: the Terminate Action mentioned in the
Service Bulletin No. MSB4O-007/3, item 1.8.2 is no longer valid.
(Refer to Service Bulletin No. MSB 40-007/4)
Remarks:
All measures must be carried out by the manufacturer, a
certified aircraft service station or a certified aircraft
maintenance mechanic.
Accomplishment of the measures must be confirmed in the log
book.
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