Maintenance Airframe; Maintenance Powerplant
Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Other / Unknown
Flight Crew Returned To Gate; Flight Crew Landed in Emergency Condition; General Flight Cancelled / Delayed
Human Factors
Had to perform deactivation of spoiler servo control per Minimum Equipment List. Suspect key may have been defective after lockout procedure; missing prong to return servo to O [position]. Bad tool. [We should ensure] all tools and equipment are in working condition before use.
During push back from ZZZ and on first engine start received a 'Flt control Fault Spoilers'. We called ZZZ Maintenance and were told to return to the gate. After some trouble shooting maintenance deferred the ground spoilers. We departed Runway XXR on the ZZZZZ [Departure] Captain's leg. After aircraft clean up and on climb out we noticed an aircraft vibration. We assumed maybe some panel or door was left open by Maintenance. Then thought about maybe one of the spoilers being out because of the MEL. Aircraft control was transferred to me; the First Officer; and Captain called Flight Attendant to go back and look out the windows to see if they saw anything. Told ATC that we would be leveling off at FL250 as climb continued and turns were done we noticed that now Alpha Prot(High Angle of Attack Protection) was increasing more than normal and now assumed that the vibration was associated with a spoiler problem. We [advised ATC] and elected to go to ZZZ1 because of long runways. ATC informed that ZZZ1 was backed up due to weather. We changed diversion location to ZZZ2. Captain briefed the flight attendants advising of the precautionary landing in ZZZ2. We ran the QRH for Over Weight Landing. On arrival into ZZZ2 we asked for long final to approach and for shallow vectors because of the increased Alpha Prot. We landed visually on Runway XX without incident. Upon arrival at the gate; I; the First Officer; went to inspect the aircraft and noticed both ground spoilers were not fully stowed. When maintenance in ZZZ2 arrived at the gate they confirmed that maintenance in ZZZ left the spoilers in what he called 'Maintenance Mode' after the deferral.
A321 Flight Crew and Mechanics reported maintenance had not properly completed the spoiler lockout procedure which resulted in a diversion.