<< >> NASA ASRS Report 311417, July 1995

Due to an emergency dc bus bar failure, flight crew of an medium large transport diverted to land after the nosewheel down position could not be confirmed by outside observation by either the tower personnel or by the pilot of an small aircraft aircraft.

Attributes
ACN	311417
Time
Date	199507
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : alb airport : swf
State Reference	NY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : alb tower : bed
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	311417
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
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 other
Consequence	faa : investigated Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Emergency dc fail. Approximately 15 mins from alb, emergency dc bus message on MFDU, with associated equipment failures. After accomplishing appropriate checklists, we did an alb tower fly-by to confirm gear position. Tower responded that the nose gear appeared to be trailing. We then had a GA aircraft try to check our gear, unsuccessfully. We decided to divert to swf because of runway length. En route had flight attendants prepare passenger for possible emergency evacuate/evacuation. This was done without use of PA, which was inoperative. Landed without incident and, upon inspection by local crash fire rescue equipment, taxied to gate and deplaned passenger.

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Original NASA ASRS Text

Title: DUE TO AN EMER DC BUS BAR FAILURE, FLC OF AN MLG DIVERTED TO LAND AFTER THE NOSEWHEEL DOWN POS COULD NOT BE CONFIRMED BY OUTSIDE OBSERVATION BY EITHER THE TWR PERSONNEL OR BY THE PLT OF AN SMA ACFT.

Narrative: EMER DC FAIL. APPROX 15 MINS FROM ALB, EMER DC BUS MESSAGE ON MFDU, WITH ASSOCIATED EQUIP FAILURES. AFTER ACCOMPLISHING APPROPRIATE CHKLISTS, WE DID AN ALB TWR FLY-BY TO CONFIRM GEAR POS. TWR RESPONDED THAT THE NOSE GEAR APPEARED TO BE TRAILING. WE THEN HAD A GA ACFT TRY TO CHK OUR GEAR, UNSUCCESSFULLY. WE DECIDED TO DIVERT TO SWF BECAUSE OF RWY LENGTH. ENRTE HAD FLT ATTENDANTS PREPARE PAX FOR POSSIBLE EMER EVAC. THIS WAS DONE WITHOUT USE OF PA, WHICH WAS INOP. LANDED WITHOUT INCIDENT AND, UPON INSPECTION BY LCL CFR, TAXIED TO GATE AND DEPLANED PAX.

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.