Air carrier large transport aircraft nose gear collapsed when aircraft came to stop after landing.

Attributes
ACN	236559
Time
Date	199303
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 9000 flight time type : 400
ASRS Report	236559
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	236868
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During final approach gear was lowered with no down/locked indication for nose gear. Go around was initiated, proceeded to an area to troubleshoot gear problem. As per checklist gear was recycled, still no down/locked indication. Light bulb was tested. Circuit breakers were checked. Proceeded with checklist. Alternate landing gear extension was next on checklist, still no down/locked indication. Performed low fly-by for visual inspection of nose gear. Said to be straight down in extended position. Declared an emergency and started preparations for landing with unsafe gear. Followed checklist. Burning off fuel. Preparing passenger/cabin for landing. Requested emergency equipment. Landed on runway 4R with normal touchdown, slowly lowering nose gear to runway. Slowed to a stop, at that time nose gear collapsed. All items on emergency evacuate/evacuation checklist were completed except passenger were asked to exit out front passenger door (L1 exit) with the aid of fire fighters. No injuries. Cause of problem: ice impacted in nosewheel well, blocking ability of locking pin to secure gear. Takeoff was in clt during moderate snow with approximately 1/4 - 1/2 inch slush on runway. Also #4 tire blew out due to brake being frozen up.

Original NASA ASRS Text

Title: ACR LGT ACFT NOSE GEAR COLLAPSED WHEN ACFT CAME TO STOP AFTER LNDG.

Narrative: DURING FINAL APCH GEAR WAS LOWERED WITH NO DOWN/LOCKED INDICATION FOR NOSE GEAR. GAR WAS INITIATED, PROCEEDED TO AN AREA TO TROUBLESHOOT GEAR PROB. AS PER CHKLIST GEAR WAS RECYCLED, STILL NO DOWN/LOCKED INDICATION. LIGHT BULB WAS TESTED. CIRCUIT BREAKERS WERE CHKED. PROCEEDED WITH CHKLIST. ALTERNATE LNDG GEAR EXTENSION WAS NEXT ON CHKLIST, STILL NO DOWN/LOCKED INDICATION. PERFORMED LOW FLY-BY FOR VISUAL INSPECTION OF NOSE GEAR. SAID TO BE STRAIGHT DOWN IN EXTENDED POS. DECLARED AN EMER AND STARTED PREPARATIONS FOR LNDG WITH UNSAFE GEAR. FOLLOWED CHKLIST. BURNING OFF FUEL. PREPARING PAX/CABIN FOR LNDG. REQUESTED EMER EQUIP. LANDED ON RWY 4R WITH NORMAL TOUCHDOWN, SLOWLY LOWERING NOSE GEAR TO RWY. SLOWED TO A STOP, AT THAT TIME NOSE GEAR COLLAPSED. ALL ITEMS ON EMER EVAC CHKLIST WERE COMPLETED EXCEPT PAX WERE ASKED TO EXIT OUT FRONT PAX DOOR (L1 EXIT) WITH THE AID OF FIRE FIGHTERS. NO INJURIES. CAUSE OF PROB: ICE IMPACTED IN NOSEWHEEL WELL, BLOCKING ABILITY OF LOCKING PIN TO SECURE GEAR. TKOF WAS IN CLT DURING MODERATE SNOW WITH APPROX 1/4 - 1/2 INCH SLUSH ON RWY. ALSO #4 TIRE BLEW OUT DUE TO BRAKE BEING FROZEN UP.

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.