Service difficulty report · Centering Mech · Saab 340B

Difficulty date
April 23, 2007
Submitted
January 7, 2008
Operation
Air carrier
Aircraft
N239CJ
Make and model
Saab 340B
Aircraft serial
239
Aircraft time
34,879 hours, 38,605 cycles
Part
Centering Mech
Part number
7227151621
Part serial
NSN
Condition
Malfunctioned
Location
Lt Ailerons
Stage of operation
CR
How discovered
O
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

CONTROL PRESSURE FOR ROLL IS AT LEAST 2X HIGHER THAN ANY OTHER ACFT PILOT HAS FLOWN. PITCH AND YAW OK. "AIL" FLASHING INTERMITTENTLY. NOTED MORE DURING TURNS. "AIL" WILL STILL FLASH INTERMITTENTLY EVEN IF AILERON TRIM IS NEUTRALIZED. CHECKED PULLEYS UNDER YOKE AT ELECTRICAL BAYS LT AND RT CHECKED AROUND AILERONS LT AND RT PULLEYS, LINKAGES. ALSO BEHIND FLAPS UNDERBELLY OF A/C. CHECKED PULLEYS UNDER FLOORBOARDS. RELUBED LINKAGES, CABLES AND PULLEYS NO OBVIOUS APPARENT DAMAGE TO CONNECTIONS OPS CHECKED AUTO PILOT IAW SAAB MM 22-10-00. OPS CHECK GOOD. REPLACED LT AILERON CENTERING MECHANISM CAM IAW SAAB MM 27-11-45-04. OPS CHECK GOOD. ALSO LUBRICATED AILERON HINGE POINTS IAW C/W 27-11-07S. OPS CHECK GOOD, PN: 7227151-621.

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