A Q400 flight crew experienced landing gear unsafe lights on final approach. They coordinated with d...

Narrative:

On final approach; 'gear down' was selected. The right main indicated amber 'doors' and red 'unsafe.' the approach was discontinued and vectors were initiated. The event continued for 60-90 seconds before the right main indicated green. On vectors: dispatch and maintenance were consulted and the abnormal situation led to the completion of alternate gear extension checklist. Flight attendants and passengers were advised. On final again: alternate gear extension checklist completed. Upon selecting gear inhibit switch on; the right main gear green light extinguished and the amber 'doors' and red 'unsafe' lights re-illuminated. At completion of checklist; the alternate extension lights indicated 3 green. Nose steering inoperative upon landing. Landing was uneventful. After landing: aircraft stopped after clearing runway; was shut down; and towed to the gate.

Original NASA ASRS Text

Title: A Q400 flight crew experienced landing gear unsafe lights on final approach. They coordinated with Dispatch and Maintenance; ran the alternate landing gear extend procedure; and landed normally.

Narrative: On final approach; 'gear down' was selected. The right main indicated amber 'doors' and red 'unsafe.' The approach was discontinued and vectors were initiated. The event continued for 60-90 seconds before the right main indicated green. On vectors: Dispatch and Maintenance were consulted and the abnormal situation led to the completion of alternate gear extension checklist. Flight Attendants and passengers were advised. On final again: Alternate gear extension checklist completed. Upon selecting gear inhibit switch on; the right main gear green light extinguished and the amber 'doors' and red 'unsafe' lights re-illuminated. At completion of checklist; the alternate extension lights indicated 3 green. Nose steering inoperative upon landing. Landing was uneventful. After landing: Aircraft stopped after clearing runway; was shut down; and towed to the gate.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	828520
Time
Date	200903
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Dash 8-400
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Other Traffic Pattern
Flight Plan	IFR
Component
Aircraft Component	Landing Gear
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Less Severe

A Q400 flight crew experienced landing gear unsafe lights on final approach. They coordinated with dispatch and maintenance; ran the alternate landing gear extend procedure; and landed normally.