Service difficulty report · Uplock Switch · Cessna 680A

Difficulty date
September 24, 2025
Submitted
October 10, 2025
Operation
Air carrier
Aircraft
N677QS
Make and model
Cessna 680A
Aircraft serial
680A0277
Aircraft time
4,406 hours, 2,910 cycles
Part
Uplock Switch
Condition
Faulted
Location
Zone 700
Stage of operation
DE
How discovered
O
Nature of condition
J
Precautionary procedure
L

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

What was found

AFTER LOWERING THE GEAR FOR LANDING, WE GOT A GEAR DISAGREE RIGHT ANNUNCIATOR ON THE RIGHT GEAR ,WE ABORTED THE APPROACH AND CLIMBED TO A SAFE ALTITUDE..WE DID THE GEAR DISAGREE R AND THEN LOOKED AT TABN1... WE ELECTED TO RECYCLE THE GEAR UP THEN DOWN WITHOUT BLOWING THE GEAR DOWN, WE THEN GOT A NORMAL ALL THREE GREEN GEAR LIGHTS AND LANDED CHECKED UPLOCK SWITCH WIRING AND FOUND CONNECTIONS TO BE CLEAN, NO RECESSED PINS AND CONTINUITY CHKS GOOD. STOWED GEAR IN UP POSITION FOR SEVERAL HOURS WHILE OCCASIONALLY SPRAYING SWITCH WITH FREEZE SPRAY. WHEN GEAR WAS LOWERED NO FAULT FOUND. WATCHED LIVE DATA ON CMC WHILE ACTUATING THE PLUNGER SWITCH AND FOUND RH UPLOCK SWITCH TO HAVE MULTIPLE CLICKS WHEN ACTUATING WHEREAS LH UPLOCK SWITCH AND OTHER AIRCRAFT ONLY HAVE ONE CLICK. THE MORE THE SWITCH IS ACTUATED THE SMOOTHER IT BECOMES. REPLACE RH UPLOCK SWITCH P/N: 65-430087. REFER TO SQUAWK 5.38 FOR REPLACEMENT OF RH UPLOCK SWITCH. REMOVED FAULTY RH MLG UPLOCK H/A P/N: 6948101-3 AND INSTALLED NEW RH MLG UPLOCK H/A P/N: 6948101-3 IAW MM 32-32-25. ADJUSTED RH MLG UPLOCK SWITCH IAW MM 32-32-00. PERFORMED LANDING GEAR OPS CHECK IAW MM 32-00-00. OPS CHECK GOOD.

More about the Cessna 680A