SDR QXEA2012092701102

Service difficulty report · Proximity Sensor · Bombdr DHC8402

Difficulty date: September 27, 2012
Submitted: October 1, 2012
Operation: Air carrier
Aircraft: N417QX
Make and model: Bombdr DHC8402
Aircraft serial: 4086
Aircraft time: 21,136 hours, 21,322 cycles
System (JASC): 3260 · Landing Gear Position and Warning
Part: Proximity Sensor
Condition: Malfunctioned
Location: Nlg
Stage of operation: CR
How discovered: O
Nature of condition: N
Precautionary procedure: A

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

What was found

RED NOSE GEAR UNSAFE LIGHT ILLUMINATED SEVERAL TIMES AT CRUISE FL 250, SOMETIMES JUST A QUICK ILLUMINATION, SOMETIMES ON AS LONG AS A FEW SECONDS. ABOUT THE TIME THE ALTERNATE GEAR EXTENSION PROCEDURE WAS STARTED AT 12,000 AND 120 KTS, THE RED NOSE GEAR UNSAFE LIGHT CAME ON AND REMAINED ON UNTIL THE NOSE GEAR WAS EXTENDED. RETURNED TO FIELD, LANDING UNEVENTFUL. REPLACED NGLK1 PROXIMITY SENSOR. GEAR SWUNG, ALL CHECKED GOOD. RETURNED TO SERVICE.