AD 2012-08-06

I do the GPS readings at six airspeeds: 125, 110, 95, 80, 65, 50 and record the results in the maintenance records. I found that the airspeed indicator read high at higher speeds and low at lower speeds and was pretty much spot on at 80 and 95. The error curve pretty much tracks what is in the Univair Alon manual.

I performed the in-flight GPS/ASI test, just this morning. Flew headings of 360/120/240 recording both GPS & ASI readings. This is best performed with low winds aloft. Keep the date ,Tach, and readings in my maintenance file and list compliance in my aircraft log.

There are a lot of Ercoupe airspeed indicator that are not repairable.as I found out when I send two down to Ruby Instr. a few months ago.... Look to see how it comes apart or i it does. They did two for me they look new $ 370. each.

Hello Fellow Ercoupe Owners! 

I've owned N323TB (Forney F-1 Serial 5705) for nearly two years now. My airplane was in for its annual condition inspection earlier this week. I got an interesting call from my mechanic today regarding AD 2012-08-06. He said that he must have missed the full extent of this AD last year and that now that he's really digging into the AD and believes it to be fairly involved. My understanding was that every four years the airspeed indicator needs to be sent to an FAA-certified repair shop (or calibrated aginst GPS using a provided spreadsheet). In addition, the ailerons must be blocked and tested for play (which can't exceed 5/16 of an inch if I remember correctly). Lastly, the entire rigging system must be inspected and adjusted. My mechanic seems to think that this would add another 4-5 hours of work every annual. 

Presumably, everyone here has experience with this AD. Any words of advice? Are we misunderstanding what is required? My mechanic is planning on calling Univair tomorrow for additional information. 

Thanks again! 

Tyler