<< >> NASA ASRS Report 978328, October 2011

An SF340 hydraulic pump autostart function failed to activate when the landing gear handle was selected down; so the standby switch was momentarily activated which resulted in normal gear positioning.

Attributes
ACN	978328
Time
Date	201110
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	SF 340B
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Hydraulic System Pump
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 15000 Flight Crew Type 25
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

After the landing gear was selected down; it was noted that the hydraulic pump did not activate as it should. Hence; the left and right main landing gear did not lock into the down position until the standby switch was selected momentarily and returned to the normal position. This action resulted in a normal gear operation allowing a continued normal approach and landing without any further abnormal activity. At no time was there any question that the action stated above would result with any other out come than a normal gear operation.

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Original NASA ASRS Text

Title: An SF340 hydraulic pump autostart function failed to activate when the landing gear handle was selected down; so the standby switch was momentarily activated which resulted in normal gear positioning.

Narrative: After the landing gear was selected down; it was noted that the hydraulic pump did not activate as it should. Hence; the left and right main landing gear did not lock into the down position until the standby switch was selected momentarily and returned to the normal position. This action resulted in a normal gear operation allowing a continued normal approach and landing without any further abnormal activity. At no time was there any question that the action stated above would result with any other out come than a normal gear operation.

Data retrieved from NASA's ASRS site as of April 2012 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.