<< >> NASA ASRS Report 921967, November 2010

A G1159 departed and landed two very cold airports. On approach the left main landing gear would not extend although its door opened. The gear extended normally using the emergency manual extension.

Attributes
ACN	921967
Time
Date	201011
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dusk
Aircraft 1
Make Model Name	Gulfstream II (G1159)
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 65 Flight Crew Total 4100 Flight Crew Type 650
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Following departure from a very cold location in canada (-24 degrees F); the landing gear was slower to retract than normal. In cold weather this is not uncommon for our aircraft. As a precaution we flew somewhat slower and lower than normal to our destination. Upon arrival at our destination which was also cold (-4 degrees F); the left main landing gear failed to indicate down and locked. We recycled the gear with the same result and then had tower visually inspect our gear on a low approach. Tower confirmed the left main landing gear door was open but the gear itself was up. We declared an in flight emergency and lowered the gear using the alternate extension checklist. We got 3 good indications (all gear down and locked) and did another low approach for visual confirmation. Tower confirmed our safe condition and we executed a visual approach to a full stop landing -- which was uneventful. After landing; we stopped straight ahead and pinned the gear before taxiing into customs/FBO. Subsequently; the aircraft was inspected by an authorized maintenance facility which jacked it up and swung the gear approximately 25 times but could not duplicate the malfunction of the main landing gear system. Aircraft returned to flight status.

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Original NASA ASRS Text

Title: A G1159 departed and landed two very cold airports. On approach the left main landing gear would not extend although its door opened. The gear extended normally using the emergency manual extension.

Narrative: Following departure from a very cold location in Canada (-24 degrees F); the landing gear was slower to retract than normal. In cold weather this is not uncommon for our aircraft. As a precaution we flew somewhat slower and lower than normal to our destination. Upon arrival at our destination which was also cold (-4 degrees F); the left main landing gear failed to indicate down and locked. We recycled the gear with the same result and then had Tower visually inspect our gear on a low approach. Tower confirmed the left main landing gear door was open but the gear itself was up. We declared an in flight emergency and lowered the gear using the alternate extension checklist. We got 3 good indications (all gear down and locked) and did another low approach for visual confirmation. Tower confirmed our safe condition and we executed a visual approach to a full stop landing -- which was uneventful. After landing; we stopped straight ahead and pinned the gear before taxiing into customs/FBO. Subsequently; the aircraft was inspected by an authorized maintenance facility which jacked it up and swung the gear approximately 25 times but could not duplicate the malfunction of the main landing gear system. Aircraft returned to flight status.

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.