CESSNA AIRCRAFT
COMPANY
SINGLE ENGINE
STRUCTURAL REPA
IR MANUAL
DYNAFOCAL-TYPE ENGINE MOUNT REPAIRS
1. General
A. The engine mount is fabricated from 4130 chrome-molybdenum steel tubing. The mount attaches to
the firewall at four points and to the engine using rubber isolation mounts at four points.
NOTE: Repair by gas welding is acceptable.
2. Engine Mount R
epairs
A. The following procedures are to be used when making repairs to the engine mount. Refer to Figure
801.
(1) All welding on
the engine mounts should be of the highest quality, since the tendency of vibration
will accentuate any minor defect present and cause fatigue cracks. Engine mount members
are preferably repaired by using larger diameter replacement tube welds. However, reinforced
30-degree sca
rf welds in place of the fishmouth welds are considered satisfactory for engine
mount repair work.
(2) Minor damage, such as a crack adjacent to an engine attaching lug, may be repaired by
rewelding th
e tube and extending a gusset past the damaged area. Extensively damaged parts
must be replaced.
(3) Engine mounting lugs and engine mount-to-fuselage attach fittings should be replaced, not
repaired.
(4) For information on damage beyond the scope of these repairs, consult Cessna Propeller
Aircraft Product Support, P.O. Box 7706, Wichita, KS 67277 USA, Telephone (316) 517-5800
or Facsimile
(316) 942-9006.
71-20-00 Page 801
© Cessna Aircraft Company Jun 1/2005
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