Air carrier crew inadvertently partially extends gear during after takeoff checks.

Attributes
ACN	451027
Time
Date	199910
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sjc.airport
State Reference	CA
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zoa.artcc tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
ASRS Report	451028
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
ASRS Report	451027
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure non adherence : company policies
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : insufficient time
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

During the after takeoff climb checklist, the first officer accidentally moved the gear handle from the up position past the off position to the partial down position. The landing gear started to extend. Gear indications were 2 red warning lights on the main gear, no indication on the nose gear. The gear handle was immediately moved back to the up position and the gear re-retracted. The incident happened at 300 KTS. The aircraft appeared to be normal once the gear was retracted. Maintenance was contacted and the decision was made to continue the flight to destination. The remainder of the flight was normal and log write-up was made. Supplemental information from acn 451028: recommend extra care be taken while moving gear handle to 'off' position -- especially above gear extension speed.

Original NASA ASRS Text

Title: ACR CREW INADVERTENTLY PARTIALLY EXTENDS GEAR DURING AFTER TKOF CHKS.

Narrative: DURING THE AFTER TKOF CLB CHKLIST, THE FO ACCIDENTALLY MOVED THE GEAR HANDLE FROM THE UP POS PAST THE OFF POS TO THE PARTIAL DOWN POS. THE LNDG GEAR STARTED TO EXTEND. GEAR INDICATIONS WERE 2 RED WARNING LIGHTS ON THE MAIN GEAR, NO INDICATION ON THE NOSE GEAR. THE GEAR HANDLE WAS IMMEDIATELY MOVED BACK TO THE UP POS AND THE GEAR RE-RETRACTED. THE INCIDENT HAPPENED AT 300 KTS. THE ACFT APPEARED TO BE NORMAL ONCE THE GEAR WAS RETRACTED. MAINT WAS CONTACTED AND THE DECISION WAS MADE TO CONTINUE THE FLT TO DEST. THE REMAINDER OF THE FLT WAS NORMAL AND LOG WRITE-UP WAS MADE. SUPPLEMENTAL INFO FROM ACN 451028: RECOMMEND EXTRA CARE BE TAKEN WHILE MOVING GEAR HANDLE TO 'OFF' POS -- ESPECIALLY ABOVE GEAR EXTENSION SPD.

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.