Service difficulty report · Actuator · Cessna 560XL

Difficulty date
July 9, 2011
Submitted
September 9, 2011
Operation
Air carrier
Make and model
Cessna 560XL
Aircraft time
3,265 hours
Engine
Pwa PW545A
Part
Actuator
Condition
Seized
Location
Stab
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

PILOTS REPORTED "STAB MISCOMPARE" ILLUMINATES AND HYD ANNUNCIATOR FAILS TO EXTINGUISH WHEN FLAPS ARE SELECTED TO THE UP POSITION, IN THE JOURNEY LOG. THE PILOTS ALSO STATED THAT THEY HAD DIFFICULTY TRIMMING THE PITCH OF THE ACFT. MX TROUBLESHOOTING DETERMINED THAT THE HORIZ STABILIZER ACTUATOR WAS SEIZED TO THE POINT WHERE IT WAS VERY DIFFICULT TO ACTUATE, AND THE HYD FLUID WITHIN HAD A STRONG "BURNING" ODOR AS THOUGH THE FLUID HAD BEEN SUBJECTED TO HIGH TEMPS. THE HORIZ STAB ACTUATOR HAS 204 HRS SINCE INSTALLATION AFTER REPAIR.

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