A Mechanic reports about the events surrounding his efforts at accomplishing the removal and installation of an ADC #2 on an Embraer 145LR; that had been released for service without proper inspections to satisfy reduced vertical separation minimums (RVSM) operational requirements.

Narrative

An Embraer 145LR aircraft had a fault of ADC #2; and was troubleshot from first shift. I had gotten the turnover verbally from first shift. I went out to the aircraft and removed and installed the air data computer (ADC). I had asked my Lead three times to bring somebody in with RII; and experience with using the barometer tester. I was met with very unclear; unintelligible responses. I had then gone out to set up the test equipment. After I had set up the test; I had called my Lead; to please send someone out with the qualifications. The Lead had sent out another Mechanic; who had never used the equipment. It had taken some time; but I was able to perform the operational checks; and leak checks in accordance with the AMM I had gotten the job done; and had signed off the logbook. The plane had left before anyone had caught the fact that I had missed the RII. And I was informed last night; by my Supervisor; that the equipment and computer were reduced vertical separation minimums (RVSM) sensitive; as well. It was caught that the RII was indeed missed; by our quality control persons; later in the evening. I am very unclear on how it missed the RVSM sensitive as well. I was not informed of this until late last night.Time; teamwork and a huge misunderstanding of the task at hand. My first mistake was not checking out the RII list. I was working under the assumption of a dated information bulletin; stating that (if); only one ADC computer's lines were broken it was not RII. The bulletin was read; as well as informed by my Lead. I was not even aware that the computer was RVSM sensitive as well. Yes; I had asked my Lead for someone with RII; and was met with resistance; and ignorance; and angry mumblings. I was told that the plane was hard timed; when I had made my 4th request for help. The help I had received was from another Mechanic; no fault of his own; but had never had even been exposed to the testing equipment. That day; we had no one qualified for avionics; nor RVSM. The job card from the AMM; and instructions from the baro tester were clear; and I was able to perform the task. I had gone ahead and signed the logbook; seeing as the computer had passed the tests.As far as I know what has transpired; is the plane had come back the next morning; and the ADC #2 was removed and replaced; with all the qualifications met.The information; is and was very easily attainable; And one thing I do know that is my fault was not reading the RII list; and working off a dated bulletin. Yes; I had asked for help; and even someone with RII. But I was focused at the job at hand; and did not make the push for the RII. Manpower is a consideration here as well. There was no one qualified to run the equipment; or has the training; for the task that night. I do not know if someone had even an inspector's qualifications that night as well. My Lead was under pressure to get the plane flying; and had a very unclear idea of the work being done; and I had received that pressure from my Lead; to get the plane off the gate. Training would also help in this case. We only do have 2 people with the qualifications working on second shift. They work opposite schedules; so if one cannot make it to work; then everyone else without training on these sensitive areas have to figure it out.