C172 pilot reported near midair collision with another small aircraft.

Attributes
ACN	1671700
Time
Date	201908
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	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	VFR
Component
Aircraft Component	Air/Ground Communication
Person 1
Function	Pilot Flying
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 175 Flight Crew Type 145
Events
Anomaly	Conflict Ground Conflict Critical Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 50 Vertical 100

Narrative:

I was on left downwind for runway xx when traffic was noticed above the airport approximately 500 feet above pattern. I reported my position and asked for response with none received. I proceeded to finish downwind base and final reporting positions on CTAF with no other traffic reporting in the pattern. On landing flare I noticed another aircraft was on runway xy that had landed heading south. In order to avoid a head on collision I went full power and diverted to the right avoiding the aircraft by 50 ft. I proceeded to do two more touch and goes without incident. Upon landing and fuel up the other pilot was still at the terminal. I asked him if his radio was operational he reported he did not know how to use it and asked for my help. I sat in his aircraft and showed him how to and dialed up ZZZ airport CTAF for him. He then stated he was going to fly back to ZZZ1. I then dialed up the tower; and showed him how to cycle between frequencies. I then hangered my aircraft and during the drive home reported the incident to ZZZ1 tower and told the controller about the incident and to be on the lookout in the event he broke their airspace without notification. I also reported the incident to the flight school (owner) of the aircraft.

Original NASA ASRS Text

Title: C172 Pilot reported NMAC with another small aircraft.

Narrative: I was on left downwind for Runway XX when traffic was noticed above the airport approximately 500 feet above pattern. I reported my position and asked for response with none received. I proceeded to finish downwind base and final reporting positions on CTAF with no other traffic reporting in the pattern. On landing flare I noticed another aircraft was on Runway XY that had landed heading south. In order to avoid a head on collision I went full power and diverted to the right avoiding the aircraft by 50 ft. I proceeded to do two more touch and goes without incident. Upon landing and fuel up the other pilot was still at the terminal. I asked him if his radio was operational he reported he did not know how to use it and asked for my help. I sat in his aircraft and showed him how to and dialed up ZZZ airport CTAF for him. He then stated he was going to fly back to ZZZ1. I then dialed up the Tower; and showed him how to cycle between frequencies. I then hangered my aircraft and during the drive home reported the incident to ZZZ1 Tower and told the Controller about the incident and to be on the lookout in the event he broke their airspace without notification. I also reported the incident to the flight school (owner) of the 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.