PA-24 pilot reported landing at a military airport due to a rough running engine.

Attributes
ACN	1522367
Time
Date	201802
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	PA-24 Comanche
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	VFR
Component
Aircraft Component	Engine
Person 1
Function	Pilot Flying Single Pilot
Qualification	Air Traffic Control Fully Certified Flight Crew Private
Experience	Flight Crew Last 90 Days 20 Flight Crew Total 300 Flight Crew Type 40
Events
Anomaly	Aircraft Equipment Problem Critical Airspace Violation All Types Deviation - Procedural FAR Ground Incursion Runway Inflight Event / Encounter Fuel Issue

Narrative:

Right at start of VFR descent - as approved by ATC; I encountered engine roughness/sputtering. My altitude at that moment was 9;300 ft. I followed the checklist and engine behavior improved temporarily. Based on my increased responsibility having 3 passengers on board; I followed a zero risk policy and asked ATC for nearby airfields. Airport X was 12 nm in the opposite direction and airport Y was 14 nm ahead. I saw a suitable landing strip to my south east inside [a military] base. I informed ATC of my intentions to land and I safely brought the plane onto the landing strip and to a halt. No damage to plane; no injuries to passengers. I shut off the engine and we disembarked the aircraft.

Original NASA ASRS Text

Title: PA-24 pilot reported landing at a military airport due to a rough running engine.

Narrative: Right at start of VFR descent - as approved by ATC; I encountered engine roughness/sputtering. My altitude at that moment was 9;300 ft. I followed the checklist and engine behavior improved temporarily. Based on my increased responsibility having 3 passengers on board; I followed a zero risk policy and asked ATC for nearby airfields. Airport X was 12 nm in the opposite direction and Airport Y was 14 nm ahead. I saw a suitable landing strip to my south east inside [a military] base. I informed ATC of my intentions to land and I safely brought the plane onto the landing strip and to a halt. No damage to plane; no injuries to passengers. I shut off the engine and we disembarked the aircraft.

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.