Narrative:

Mechanic Y and I were asked to go on a field service to ZZZ1 for an A320 aircraft due to a [flight] crew refusal for deferred inboard spoilers. After arrival; I asked mechanic Y to reactivate the spoilers to [perform] ops check on them. He seemed to be confused on the procedure even though he had the proper maintenance manual. I am the avionics (electrician) and he is the mechanic. After a while he seemed confident the spoilers were reactivated. I swapped in a new spoiler computer to see if that would fix it; it did not. I advised mechanic X the flight fault was the right #1 spoiler actuator. He proceeded to change it. The indication in the cockpit got better; but was not in accordance with maintenance manual. Mechanic Y at this point wanted to get back to ZZZ on the next flight. With the aid of the FBO mechanic; they proceeded to deactivate the left and right #1 spoilers and re-defer the spoilers. I was packing up tools; parts and starting to clean the area up. With the aircraft released; we flew the same aircraft with the spoiler problem back to ZZZ. On approach into ZZZ; I first noticed a vibration in the first class area. The vibration got worse and the aircraft was shaking. I was seated by the galley and could hear the equipment shake also. One flight attendant described it like a landing roll out; when the whole aircraft shakes with reversers deployed; but we were airborne. After landing; we were deplaning and the captain wanted to talk to me in the cockpit. He asked me if I felt the shaking and I said yes. He stated this happened when the flaps were lowered. We agreed that the spoilers were floating. He also stated this aircraft was unsafe to fly and un-airworthy. I thought the plane was going to come unglued during the shaking from where I was seated. If I knew this was going to happen; I would not fly this aircraft or release it to the crew. The lead mechanic verified on arrival at the gate that the #1 spoilers were deflected up to two inches when they were supposed to be deactivated per MEL. Mechanic Y also asked the flight attendants if they felt the shaking on the previous flight. The answer was no. There was no report of vibration on the previous flight. This all happened after the spoiler actuator was replaced.

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Original NASA ASRS Text

Title: A Line Avionics Mechanic reports he worked with another Mechanic to address a Flight Crew refusal of an A320 aircraft with deferred inboard ground spoilers. Efforts to correct problem were not successful. Inboard spoilers were deactivated and aircraft released. Aircraft experienced severe vibration on approach when flaps lowered.

Narrative: Mechanic Y and I were asked to go on a Field Service to ZZZ1 for an A320 aircraft due to a [Flight] Crew refusal for deferred inboard spoilers. After arrival; I asked Mechanic Y to reactivate the spoilers to [perform] ops check on them. He seemed to be confused on the procedure even though he had the proper Maintenance Manual. I am the Avionics (Electrician) and he is the Mechanic. After a while he seemed confident the spoilers were reactivated. I swapped in a new Spoiler Computer to see if that would fix it; it did not. I advised Mechanic X the Flight Fault was the right #1 spoiler actuator. He proceeded to change it. The indication in the cockpit got better; but was not in accordance with Maintenance Manual. Mechanic Y at this point wanted to get back to ZZZ on the next flight. With the aid of the FBO Mechanic; they proceeded to deactivate the left and right #1 Spoilers and re-defer the spoilers. I was packing up tools; parts and starting to clean the area up. With the aircraft released; we flew the same aircraft with the spoiler problem back to ZZZ. On approach into ZZZ; I first noticed a vibration in the First Class area. The vibration got worse and the aircraft was shaking. I was seated by the galley and could hear the equipment shake also. One Flight Attendant described it like a landing roll out; when the whole aircraft shakes with reversers deployed; but we were airborne. After landing; we were deplaning and the Captain wanted to talk to me in the cockpit. He asked me if I felt the shaking and I said yes. He stated this happened when the flaps were lowered. We agreed that the spoilers were floating. He also stated this aircraft was unsafe to fly and un-airworthy. I thought the plane was going to come unglued during the shaking from where I was seated. If I knew this was going to happen; I would not fly this aircraft or release it to the crew. The Lead Mechanic verified on arrival at the gate that the #1 Spoilers were deflected up to two inches when they were supposed to be deactivated per MEL. Mechanic Y also asked the Flight Attendants if they felt the shaking on the previous flight. The answer was no. There was no report of vibration on the previous flight. This all happened after the spoiler actuator was replaced.

Data retrieved from NASA's ASRS site as of April 2012 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.