Service difficulty report · Connecting Rod · Dhav DHC6100

Difficulty date
May 24, 2005
Submitted
June 2, 2005
Operation
General aviation
Make and model
Dhav DHC6100
Aircraft time
26,591 hours
Engine
Pwa PT6A20
Part
Connecting Rod
Condition
Binding
Location
Intake Deflector
Component
Deflector
Component part number
C6EC10553
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING OVERHAUL AND FUNCTION TESTING, THE INTAKE DEFLECTOR ACTUATOR WAS FOUND TO BE BINDING DURING OPERATION. THE CONNECTING ROD HAD BEEN ASSEMBLED AND RIGGED IAW THE CMM CH 71-60-01, FIGURE 1, PAGE 5, WITH THE ROD ENDS AT 90 DEGREES TO EACH OTHER. IT WAS FOUND DURING OPERATION THAT THE ROD END WOULD REACH THE LIMIT OF ITS SIDEWAYS TRAVEL BEFORE THE PISTON REACHED FULL TRAVEL, CAUSING IT TO BIND. WHEN THE ROD END WERE RIGGED IN THE SAME PLANE, THE PISTON DID NOT BIND AND THE SYSTEM OPERATED NORMALLY. THE SUBMITTER REPORTS THAT HE HAS DONE THIS TO OTHER CONNECTING RODS IN THE PAST.