DA40 pilot reported the airspeed indicator failed during a test flight following major work on the a...

Narrative:

During a test flight; the aircraft in question was being test flown after a major repair. To test the attachment of the wing; a soft field take-off was performed to an immediate landing. On the second take-off the same technique was used; however during the acceleration part of the take-off the airspeed was noted to read zero on both the G1000 airspeed tape; as well as the analog indicator. Since the airplane was airborne and the runway is relatively short; it was questionable whether the airplane can land after having been stabilized in ground effect. The decision was to continue with climb out and come around for a landing using known pitch attitudes and power settings; as the approach strategy; and using the ground-speed from the GPS as a rough reference. No change in airspeed by activating pitot heat. When the alternate air source was opened a drastic change in the altimeter was noticed - 250 feet variation -; but no change in airspeed. Squawk was set to 7700; and approach was contacted as a standard procedure. The landing was executed and approach was contacted through a phone number upon request by ATC. The airplane suffered no damage at all. The mechanic re-inspected the airplane; the airspeed indicator was adjusted; the airplane was fast taxied twice and airspeed still did not read at all. The third time; the mechanic readjusted; and airspeed came alive during ground roll. Test flight continued with no other discrepancies noted.

Original NASA ASRS Text

Title: DA40 pilot reported the airspeed indicator failed during a test flight following major work on the aircraft.

Narrative: During a test flight; the aircraft in question was being test flown after a major repair. To test the attachment of the wing; a soft field take-off was performed to an immediate landing. On the second take-off the same technique was used; however during the acceleration part of the take-off the airspeed was noted to read zero on both the G1000 airspeed tape; as well as the analog indicator. Since the airplane was airborne and the runway is relatively short; it was questionable whether the airplane can land after having been stabilized in ground effect. The decision was to continue with climb out and come around for a landing using known pitch attitudes and power settings; as the approach strategy; and using the ground-speed from the GPS as a rough reference. No change in airspeed by activating pitot heat. When the alternate air source was opened a drastic change in the altimeter was noticed - 250 feet variation -; but no change in airspeed. Squawk was set to 7700; and Approach was contacted as a standard procedure. The landing was executed and Approach was contacted through a phone number upon request by ATC. The airplane suffered no damage at all. The mechanic re-inspected the airplane; the airspeed indicator was adjusted; the airplane was fast taxied twice and airspeed still did not read at all. The third time; the mechanic readjusted; and airspeed came alive during ground roll. Test flight continued with no other discrepancies noted.

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.

Attributes
ACN	1563990
Time
Date	201807
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	DA40 Diamond Star
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	Airspeed Indicator
Person 1
Function	Single Pilot
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial
Experience	Flight Crew Last 90 Days 300 Flight Crew Total 750 Flight Crew Type 725
Events
Anomaly	Aircraft Equipment Problem Less Severe