A C180 pilot; after tower informed them they were not receiving the transponder ident; realized that...

Narrative:

I was on a VFR flight to falcon field (ffz); enroute at 3;200 ft MSL to overfly chandler class D airspace. I had in accordance with tuned into GPS to avoid in accordance with class D airspace. I had the second channel on GPS tuned into pxr VOR to avoid phx class B airspace.I was also monitoring chd tower on the number 1 comm for traffic information on overflight. I was constantly switching GPS to check distance from in accordance with; chd; pxr VOR; and ffz. At approximately 9 miles south of ffz I called to let them know I was inbound for landing. Tower responded by asking me to ident and to enter left downwind for [runway] 22L. They later said they did not observe my ident; but to enter left downwind. Thinking something was wrong with my transponder I said of and asked if I could ident again. After some confusion I realized that I had not switched from chd tower frequency to ffz tower frequency. Thinking that I had been with falcon tower I had entered their airspace without clearance.I turned away from falcon traffic pattern called in and was cleared to enter a left downwind for [runway] 22L. Rest of flight was uneventful and there was no traffic conflict with falcon field.bottom line; after checking and double checking my position in the airspace I failed to double check my comm frequency.

Original NASA ASRS Text

Title: A C180 pilot; after Tower informed them they were not receiving the transponder ident; realized that they had not switched to FFZ Tower frequency and entered FFZ Class D airspace without clearance.

Narrative: I was on a VFR flight to Falcon Field (FFZ); enroute at 3;200 FT MSL to overfly Chandler Class D Airspace. I had IAW tuned into GPS to avoid IAW Class D Airspace. I had the second channel on GPS tuned into PXR VOR to avoid PHX Class B Airspace.I was also monitoring CHD Tower on the Number 1 Comm for traffic information on overflight. I was constantly switching GPS to check distance from IAW; CHD; PXR VOR; and FFZ. At approximately 9 miles south of FFZ I called to let them know I was inbound for landing. Tower responded by asking me to ident and to enter left downwind for [Runway] 22L. They later said they did not observe my ident; but to enter left downwind. Thinking something was wrong with my transponder I said of and asked if I could ident again. After some confusion I realized that I had not switched from CHD Tower frequency to FFZ Tower frequency. Thinking that I had been with Falcon Tower I had entered their airspace without clearance.I turned away from Falcon traffic pattern called in and was cleared to enter a left downwind for [Runway] 22L. Rest of flight was uneventful and there was no traffic conflict with Falcon Field.Bottom line; after checking and double checking my position in the airspace I failed to double check my Comm frequency.

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	1155833
Time
Date	201402
Local Time Of Day	1201-1800
Place
Locale Reference	FFZ.Airport
State Reference	AZ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna 180 Skywagon
Flight Phase	Descent
Route In Use	Visual Approach
Person 1
Function	Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Commercial Flight Crew Flight Engineer Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 190 Flight Crew Total 25000 Flight Crew Type 300
Events
Anomaly	Airspace Violation All Types

A C180 pilot; after tower informed them they were not receiving the transponder ident; realized that they had not switched to ffz tower frequency and entered ffz class D airspace without clearance.