<< >> NASA ASRS Report 805109, September 2008

B737 captain reports unsafe right main landing gear during approach. Flight diverts and manual extension is successful resulting in uneventful landing.

Attributes
ACN	805109
Time
Date	200809
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	805109
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : lg indication other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : diverted to another airport flight crew : declared emergency
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On approach ZZZ right main gear failed to extend and we did a low approach and verified right main was up with tower. Declared an emergency and requested vectors to ZZZ1 while we ran the emergency checklist. When we manually extended the right main gear we got a good down and locked indication on the right main gear. We contacted company and had them advise ZZZ1 of our direct. We continued to ZZZ1 as we were already on downwind and had only 4400 pounds of fuel remaining. Landing; rollout and taxi in were uneventful but had the emergency equipment roll with the aircraft as a precaution. At arrival to gate we pinned the gear and completed all appropriate communications with dispatch; company; etc.

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Original NASA ASRS Text

Title: B737 CAPT REPORTS UNSAFE R MAIN LANDING GEAR DURING APPROACH. FLT DIVERTS AND MANUAL EXTENSION IS SUCCESSFUL RESULTING IN UNEVENTFUL LANDING.

Narrative: ON APCH ZZZ R MAIN GEAR FAILED TO EXTEND AND WE DID A LOW APCH AND VERIFIED R MAIN WAS UP WITH TWR. DECLARED AN EMER AND REQUESTED VECTORS TO ZZZ1 WHILE WE RAN THE EMER CHKLIST. WHEN WE MANUALLY EXTENDED THE R MAIN GEAR WE GOT A GOOD DOWN AND LOCKED INDICATION ON THE R MAIN GEAR. WE CONTACTED COMPANY AND HAD THEM ADVISE ZZZ1 OF OUR DIRECT. WE CONTINUED TO ZZZ1 AS WE WERE ALREADY ON DOWNWIND AND HAD ONLY 4400 LBS OF FUEL REMAINING. LNDG; ROLLOUT AND TAXI IN WERE UNEVENTFUL BUT HAD THE EMER EQUIP ROLL WITH THE ACFT AS A PRECAUTION. AT ARR TO GATE WE PINNED THE GEAR AND COMPLETED ALL APPROPRIATE COMS WITH DISPATCH; COMPANY; ETC.

Data retrieved from NASA's ASRS site as of May 2009 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.