Service difficulty report · Trim System · Cessna 425

Difficulty date
May 7, 2009
Submitted
May 7, 2009
Operation
General aviation
Aircraft
N49GM
Make and model
Cessna 425
Aircraft serial
0165
Aircraft time
4,797 hours, 4,982 cycles
Engine
Pwa PT6*
Part
Trim System
Condition
Out Of Rig
Location
Elevator Tab
Stage of operation
NR
How discovered
O
Nature of condition
F
Precautionary procedure
O

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

What was found

FOUND ELEVATOR TRIM TAB HORN CONTACTING ELEVATOR SKIN AT 15 DEGREES TAB DOWN AND TRIM CABLE CAN NOT BE WRAPPED AT SERVO IAW MM. CALLED TECH SUPPORT, SENT AN E-MAIL STATING THAT THE RIGGING PROCEDURE FOR THE TRIM IS INCORRECT IN THE MM. MFG WILL CHANGE THE M/M. INSTALLED NEW TRIM TAB CONTROL ROD MOUNT HARDWARE: BOLTS 2 EACH P/N NAS464P4-8., BOLTS 2 EACH P/N NAS464P4-9., NUTS 4 EACH P/N MS17825-4. REINSTALLED ALL ITEMS REMOVED FOR CABLE INSPECTION. RIGGED ELEVATOR TRIM SYS IAW TECH SUPPORT INSTRUCTIONS. TAB DOWN STOP CONTACTS AT THE SAME TIME AS HORN CONTACTS ELEVATOR SKIN PRIOR TO FULL DEFLECTION. REFERENCE MM 27-00-00 AND 27-30-02.

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