Service difficulty report · Uplock Switch · Saab 340B

Difficulty date
February 6, 2019
Submitted
February 15, 2019
Operation
Air carrier
Aircraft
N331AG
Make and model
Saab 340B
Aircraft serial
340B430
Aircraft time
35,639 hours, 38,816 cycles
Engine
Ge CT79B
Part
Uplock Switch
Part number
MS213212
Condition
Failed
Location
Mlg
Stage of operation
AP
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

FLIGHT# 0082 WHEN GEAR HANDLE WAS PUT TO DOWN POSITION HYD PUMP BEGAN NORMAL OPERATION BUT W/IN 2-3 SECONDS OF TRANSITION A LOUD THUMP WAS HEARD IN THE AREA OFTHE NOSE GEAR. TRANSITION TIME WAS NORMAL WITH 3 DOWN AND LOCKED INDICATION. THERE WAS NOT ABNORMAL VISUAL INDICATION OF THE NOSE GEAR UPON POST FLIGHT INSPECTION. R&R RH MLG UPLOCK SWITCH IAW AMM 32-61-15-02 OPS CHECKED GOOD.

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