<< >> NASA ASRS Report 1202112, September 2014

An SR20 pilot experienced a sudden airspeed drop on short final to runway 16 at 2r9; attributing the loss to 23K quartering headwinds being deflected by four 50' tall billboards on short final to the runway.

Attributes
ACN	1202112
Time
Date	201409
Local Time Of Day	1201-1800
Place
Locale Reference	2R9.Airport
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 68 Flight Crew Total 164 Flight Crew Type 71
Events
Anomaly	Inflight Event / Encounter Unstabilized Approach Inflight Event / Encounter Weather / Turbulence

Narrative:

While on a circling approach to runway 16 at 2r9 (karnes county airport); tall (approximately 50 foot high) billboards approximately 200' from the approach threshold of runway deflected a 23K left quartering headwind upward at high velocity; causing 15K drop in indicated airspeed on short final. The pilot and his IFR instructor decided to execute a go around. Go around safely executed. The placement of these billboards is hazardous to air navigation. I am especially concerned about night or actual IMC landings here due to their location.

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Original NASA ASRS Text

Title: An SR20 pilot experienced a sudden airspeed drop on short final to runway 16 at 2R9; attributing the loss to 23K quartering headwinds being deflected by four 50' tall billboards on short final to the runway.

Narrative: While on a circling approach to RWY 16 at 2R9 (Karnes County Airport); tall (approximately 50 foot high) billboards approximately 200' from the approach threshold of RWY deflected a 23K left quartering headwind upward at high velocity; causing 15K drop in indicated airspeed on short final. The pilot and his IFR instructor decided to execute a go around. Go around safely executed. The placement of these billboards is hazardous to air navigation. I am especially concerned about night or actual IMC landings here due to their location.

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.