Regional Jet 900 (CRJ900)
Maintenance Airframe; Maintenance Powerplant
Communication Breakdown; Situational Awareness; Training / Qualification
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Manuals
Was sent to do this job with another co-worker to do MEL on Engine Driven Pump (EDP). I'm still on bye back. We installed a flying kit for engine driven pump. However; we misread one step and forgot to install a nut into a spline shaft. This lead to oil splitting from engine driven pump. Training not adequate.
A Line Aircraft Maintenance Technician (AMT) was informed that oil had leaked from an Engine Driven Pump (EDP) on a CRJ-900 aircraft after he and another Technician had installed a flying kit as part of an MEL deferral for a # 2 Engine EDP. They had misread one step and forgot to install a nut onto the spline shaft.