Narrative:

During IFR training flight; in VFR conditions; after the missed approach at ZZZ; I climbed to 3;500 feet and proceeded north. I contacted ZZZ approach and requested 4;000 feet. The controller was busy and said he would get back to me. A minute later the controller cleared me to 4;000 feet and direct to ZZZ VOR.the mistake was after I declared a missed approach at ZZZ; without further guidance from the controller; I should have flown the published missed approach for the VOR runway xx. Maximum altitude would have been 3;000 feet according to the published missed approach. Looking back; when the ZZZ controller cleared me for the approach to VOR runway xx; into ZZZ; he also instructed me to contact the airport advisor frequency. Due to covid-19; the ZZZ tower was closed and there was no advisory frequency published for the airport. In retrospect; I should have called the ZZZ controller right back and informed them of this before I continued with the approach to ZZZ.in my defense; the controller could have instructed me to fly the missed approach or given me other missed approach instructions before he cleared me for the approach to ZZZ and instructed me to change frequencies. There were no other airplanes flying nearby and conditions were VFR. The controller made no mention of the deviation.

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Original NASA ASRS Text

Title: Pilot reported executing the wrong missed approach procedure after not being issued missed approach instructions. ATC cleared the pilot for the approach and issued instructions to contact airport advisory frequency; however there was no such frequency published for the airport and the Tower was closed due to the COVID-19 pandemic.

Narrative: During IFR training flight; in VFR conditions; after the missed approach at ZZZ; I climbed to 3;500 feet and proceeded north. I contacted ZZZ Approach and requested 4;000 feet. The Controller was busy and said he would get back to me. A minute later the Controller cleared me to 4;000 feet and direct to ZZZ VOR.The mistake was after I declared a missed approach at ZZZ; without further guidance from the Controller; I should have flown the published missed approach for the VOR Runway XX. Maximum altitude would have been 3;000 feet according to the published missed approach. Looking back; when the ZZZ Controller cleared me for the approach to VOR Runway XX; into ZZZ; he also instructed me to contact the airport advisor frequency. Due to COVID-19; the ZZZ Tower was closed and there was no advisory frequency published for the airport. In retrospect; I should have called the ZZZ Controller right back and informed them of this before I continued with the approach to ZZZ.In my defense; the Controller could have instructed me to fly the missed approach or given me other missed approach instructions before he cleared me for the approach to ZZZ and instructed me to change frequencies. There were no other airplanes flying nearby and conditions were VFR. The Controller made no mention of the deviation.

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.