C172RG instructor and back seat observer reported landing with the gear retracted.

Attributes
ACN	1353993
Time
Date	201605
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	None
Component
Aircraft Component	Landing Gear
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Commercial Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 700
Person 2
Function	Other / Unknown
Qualification	Flight Crew Commercial Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 70 Flight Crew Total 542 Flight Crew Type 460
Events
Anomaly	Ground Event / Encounter Gear Up Landing

Narrative:

While performing a simulated engine failure and landing the gear was not extended which resulted in a gear-up landing. The gear warning horn was working properly. Poor checklist usage resulted in the gear up landing.

Original NASA ASRS Text

Title: C172RG instructor and back seat observer reported landing with the gear retracted.

Narrative: While performing a simulated engine failure and landing the gear was not extended which resulted in a gear-up landing. The gear warning horn was working properly. Poor checklist usage resulted in the gear up landing.

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.