Service difficulty report · Uplock Switch · Cessna 750

Difficulty date
June 7, 2009
Submitted
June 8, 2009
Operation
Air carrier
Aircraft
N914QS
Make and model
Cessna 750
Aircraft serial
7500296
Aircraft time
317 hours, 203 cycles
Part
Uplock Switch
Part number
S31771
Condition
Malfunctioned
Location
Mlg
Stage of operation
CL
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

ON DEPARTURE, WHEN RETRACTING THE MLG RECEIVED A RED GEAR UNLOCK LIGHT WITH ALL 3 GREEN MLG LIGHTS EXTINGUISHED. AFTER EXTENDING THE MLG ALL INDICATIONS WERE NORMAL. JACKED ACFT CYCLED GEAR, COULD NOT DUPLICATE, INSPECTED GEAR WELLS, CONNECTORS IN WELLS, AND UPLOCK SWITCH ADJUSTMENTS, NOSE UPLOCK SWITCH AND LT MLG UPLOCK SWITCH CHECK GOOD, R/H MLG UPLOCK SWITCH HAS EXCESSIVE ENGAGEMENT, OUT OF TOLERANCE, SWITCH TRAVEL ALSO ROUGH. REMOVED AND REPLACED R/H UPLOCK SWITCH, OPS CHECKS GOOD. FOUND L/H UPLOCK SWITCH BELOW MINIMUM ENGAGEMENT. ADJUSTED OPS CHECKS GOOD. VERIFIED NLG EXTENSION AND SERVICING GOOD ALSO. WORK IAW MM 32-30-05.

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