C170 pilot reported possible class B violation while avoiding another aircraft.

Attributes
ACN	1638860
Time
Date	201904
Local Time Of Day	0601-1200
Place
Locale Reference	FUL.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna 170
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Function	Single Pilot
Qualification	Flight Crew Private Flight Crew Instrument
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 6801 Flight Crew Type 5300
Events
Anomaly	Airspace Violation All Types Conflict NMAC Deviation - Procedural FAR Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 500 Vertical 500

Narrative:

While flying to ZZZ; the ful tower said to either climb or descend to avoid a medfly aircraft at my then altitude of 2;000 feet MSL. I would soon be passing over hills so I chose to climb to avoid the medfly aircraft. I leveled off for a few seconds at 2;400 MSL as I saw the medfly below and reported it to ful tower and descended.I noticed that I was under the south east corner of the lax class B. I decided to report this as I usually stay at 2;000 MSL in this area and I do not know what the computers said my altitude was. If there was any intrusion into class B it was inadvertent due to towers request I avoid the other aircraft and my eyes were out the window looking for the other aircraft. I had my foreflight display on my mini but was looking for the actual aircraft.

Original NASA ASRS Text

Title: C170 pilot reported possible Class B violation while avoiding another aircraft.

Narrative: While flying to ZZZ; the FUL Tower said to either climb or descend to avoid a medfly aircraft at my then altitude of 2;000 feet MSL. I would soon be passing over hills so I chose to climb to avoid the medfly aircraft. I leveled off for a few seconds at 2;400 MSL as I saw the medfly below and reported it to FUL Tower and descended.I noticed that I was under the south east corner of the LAX class B. I decided to report this as I usually stay at 2;000 MSL in this area and I do not know what the computers said my altitude was. If there was any intrusion into class B it was inadvertent due to towers request I avoid the other aircraft and my eyes were out the window looking for the other aircraft. I had my ForeFlight display on my mini but was looking for the actual 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.