Beechcraft king air pilot reported that the landing gear collapsed upon landing.

Attributes
ACN	1515168
Time
Date	201801
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	King Air C90 E90
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Gear Down Lock
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Instrument Flight Crew Private Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 30 Flight Crew Total 4400 Flight Crew Type 800
Events
Anomaly	Aircraft Equipment Problem Less Severe Ground Event / Encounter Gear Up Landing

Narrative:

On takeoff; the gear failed to retract. Nearing ZZZ I attempted to extend the landing gear utilizing the manual extension system. This system appeared to be jammed and would not extend the landing gear to the locked position. I advised ATC and requested a tower flyby to visually confirm the landing gear position. Tower advised the gear appeared down. Upon landing; all 3 landing gear retracted.

Original NASA ASRS Text

Title: Beechcraft King Air pilot reported that the landing gear collapsed upon landing.

Narrative: On takeoff; the gear failed to retract. Nearing ZZZ I attempted to extend the landing gear utilizing the manual extension system. This system appeared to be jammed and would not extend the landing gear to the locked position. I advised ATC and requested a Tower flyby to visually confirm the landing gear position. Tower advised the gear appeared down. Upon landing; all 3 landing gear retracted.

Data retrieved from NASA's ASRS site 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.