Service difficulty report · Linkage · Lear 45LEAR

Difficulty date
June 19, 2019
Submitted
August 17, 2020
Operation
General aviation
Make and model
Lear 45LEAR
Aircraft time
6,203 hours
Part
Linkage
Part number
6PA206EN
Condition
Damaged
Location
Squat Switch
Part time
5,946 hours
Component
Squat Switch · Hnywl
Component part number
6PA206EN
Stage of operation
NR
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

(CAN) ON TAKEOFF THE CREW HAD A RED `TAKE OFF TRIM`, WHITE `SEC TRIM FAULT` AND WHITE `PRI TRIM FAULT` EICAS MESSAGES . THE CREW FOLLOWED THERE CHECKLIST WITH NO FAULTS. APPROXIMATELY 10 MINUTES INTO THERE FLIGHT THEY HAD A `LH ENG COMP` FAULT` EICAS MESSAGE AS WELL. THE CREW FOLLOWED THE CHECKLIST WITH NO FAULTS. WHEN WE STARTED TO LOOK INTO THIS SNAG IT SEEMED TO HAVE A RELATIONSHIP WITH A W.O.W INPUT. AFTER RETURN, A QUICK LOOK AT BOTH MLG SQUAT SWITCH`S INDICATED S35 LH MLG OUTBOARD SQUAT SWITCH LINK ARM BROKEN AND SQUAT SWITCH INPUT SHAFT BENT. THROUGH SOME DISCUSSION, IT WAS BELIEVED THAT THE WELD JOINT ON THE LINK ARM HAD BROKE OFF AND WHEN THE AIRCRAFT TOOK OFF THIS WOULD HAVE INDUCED THE LINK ARM TO BENT AND BREAK IN THE WAY IT HAD, CAUSING THE CAS MESSAGES. SINCE REPAIR IT HAS FLOWN WITHOUT ANY FAULTS. (TC# 20190620006)