Intermittent unsafe landing indication.

Attributes
ACN	280060
Time
Date	199408
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pit
State Reference	PA
Altitude	agl bound lower : 100 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pit
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	descent : approach landing other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 240 flight time total : 4800 flight time type : 350
ASRS Report	280060
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On a scheduled part 135 air carrier flight from chb, wv, and pit, PA. On our before landing check nose gear did show positive downlock from cockpit indications. Recycled gear. Nothing made missed approach/go around VFR went through checklists and briefed passenger. Made low approach. Tower and aircraft on ground and all 3 gear appeared down. Talked to company/reviews checklist again briefed passenger and came in for an uneventful landing. Upon touchdown all unsafes disappeared and green light came on. Problem was idented as a probable switch problem.

Original NASA ASRS Text

Title: INTERMITTENT UNSAFE LNDG INDICATION.

Narrative: ON A SCHEDULED PART 135 ACR FLT FROM CHB, WV, AND PIT, PA. ON OUR BEFORE LNDG CHK NOSE GEAR DID SHOW POSITIVE DOWNLOCK FROM COCKPIT INDICATIONS. RECYCLED GEAR. NOTHING MADE MISSED APCH/GAR VFR WENT THROUGH CHKLISTS AND BRIEFED PAX. MADE LOW APCH. TWR AND ACFT ON GND AND ALL 3 GEAR APPEARED DOWN. TALKED TO COMPANY/REVIEWS CHKLIST AGAIN BRIEFED PAX AND CAME IN FOR AN UNEVENTFUL LNDG. UPON TOUCHDOWN ALL UNSAFES DISAPPEARED AND GREEN LIGHT CAME ON. PROB WAS IDENTED AS A PROBABLE SWITCH PROB.

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.