Service difficulty report · Duct · Dhav DHC3

Difficulty date
April 7, 2015
Submitted
August 5, 2015
Operation
General aviation
Make and model
Dhav DHC3
Aircraft time
13,575 hours
Engine
Pwa PT6A34
Propeller
Hartzl HCB3TN3
Part
Duct
Part number
310926302
Condition
Cracked
Location
Exhaust
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) DURING A NON-SCHEDULED HOT SECTION INSPECTION, THE LARGE EXIT DUCT WAS FOUND CRACKED IN MULTIPLE LOCATIONS ALONG THE OUTER SEAM WELD. THE CRACKS TOTALED APPROXIMATELY HALF OF THE CIRCUMFERENCE OF THE LED. THE TSO OF THE LED IS 1887.5 HOURS. THIS OPERATOR HAS HAD NUMEROUS PREVIOUS INSTANCES OF CRACKED LED`S.