B737-300 crew had unsafe gear indication on the right main gear at pit.

Attributes
ACN	489724
Time
Date	200010
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : pit.airport
State Reference	PA
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : pit.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 32 other
Flight Phase	descent : approach landing : roll
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 27000 flight time type : 7000
ASRS Report	489724
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : gear warning system other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist controller : issued new clearance flight crew : landed in emergency condition flight crew : declared emergency
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On final approach to runway 32 pit, landing gear extension check revealed no green light on right main gear. Abandoned the approach and recycled landing gear, no green light. Conferred with air carrier maintenance, who suggested 'manual extension.' reviewed and rehearsed QRH procedures, fully briefed cabin crew and passenger, manually extended landing gear. Performed 2 separate visual checks of gear status via cabin view ports. Both revealed and 'unlocked right main gear.' performed 2 low fly-by's for exterior inspection by ATC tower and ground maintenance personnel. These were inconclusive. Reviewed and rehearsed QRH procedures for both lndgs with unsafe landing gear and possible cabin evacuate/evacuation. Declared an emergency and the landing was completed without further incident. The landing gear was inspected by ground maintenance personnel and secured via downlock pin. The aircraft was then taxied to the gate and secured. An appropriate notation was made in the aircraft maintenance logbook.

Original NASA ASRS Text

Title: B737-300 CREW HAD UNSAFE GEAR INDICATION ON THE R MAIN GEAR AT PIT.

Narrative: ON FINAL APCH TO RWY 32 PIT, LNDG GEAR EXTENSION CHK REVEALED NO GREEN LIGHT ON R MAIN GEAR. ABANDONED THE APCH AND RECYCLED LNDG GEAR, NO GREEN LIGHT. CONFERRED WITH ACR MAINT, WHO SUGGESTED 'MANUAL EXTENSION.' REVIEWED AND REHEARSED QRH PROCS, FULLY BRIEFED CABIN CREW AND PAX, MANUALLY EXTENDED LNDG GEAR. PERFORMED 2 SEPARATE VISUAL CHKS OF GEAR STATUS VIA CABIN VIEW PORTS. BOTH REVEALED AND 'UNLOCKED R MAIN GEAR.' PERFORMED 2 LOW FLY-BY'S FOR EXTERIOR INSPECTION BY ATC TWR AND GND MAINT PERSONNEL. THESE WERE INCONCLUSIVE. REVIEWED AND REHEARSED QRH PROCS FOR BOTH LNDGS WITH UNSAFE LNDG GEAR AND POSSIBLE CABIN EVAC. DECLARED AN EMER AND THE LNDG WAS COMPLETED WITHOUT FURTHER INCIDENT. THE LNDG GEAR WAS INSPECTED BY GND MAINT PERSONNEL AND SECURED VIA DOWNLOCK PIN. THE ACFT WAS THEN TAXIED TO THE GATE AND SECURED. AN APPROPRIATE NOTATION WAS MADE IN THE ACFT MAINT LOGBOOK.

Data retrieved from NASA's ASRS site as of July 2007 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.