Service difficulty report · Uplock Sensor · Bombdr DHC8400

Difficulty date
April 14, 2015
Submitted
August 5, 2015
Operation
General aviation
Make and model
Bombdr DHC8400
Engine
Pwc PW150A
Part
Uplock Sensor
Condition
Out Of Tolerance
Location
Rt Mlg
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

(CAN) AFTER TAKEOFF/GEAR RETRACTION RT GEAR DOOR LIGHT, RT GEAR UNSAFE AND GEAR HANDLE LIGHTS ILLUMINATED. OCCASIONAL "PARTIAL" GEAR MOVEMENT NOTICED. RAN CHECKLIST AND ALT GEAR EXTENSION PERFORMED. MAINTENANCE INTERROGATED PSEU RIGGING HISTORY. FOUND RT GEAR UPLOCK NEAR GAP TOO LARGE, POSTED 7 TIMES. WITH UPLOCK LOCKED, RT GEAR UPLOCK INDUCTANCE VALUE 7.930 MH. DATA FROM FDR DOWNLOAD SHOWED DURING GEAR RETRACTION RT GEAR UPLOCK MOMENTARILY INDICATED LOCKED BEFORE INDICATING UNLOCKED. AFTER ADJUSTMENT RT GEAR UPLOCK INDUCTANCE VALUE 8.430MH, LT GEAR UPLOCK INDUCTANCE VALUE 8.440MH.