B737-800
Maintenance Powerplant; Maintenance Airframe
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft Equipment Problem Dissipated; Flight Crew Returned To Gate; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft; Procedure
Aircraft X has had two tail pipe fires on March XXth and XYth reported to the pilot by the Flight Attendant; Passengers and another aircraft that was behind them. Both times the engine was ran and signed off as no faults; it would appear that there is an issue if there have been two tailpipe fires in one week.  The Number 2 engine has also used twice the amount of oil as the Number 1 for the month of March. Number 2 engine is leaking a large amount of oil into the tail pipe causing a tail pipe fire two times. Investigate leak and repair.
Technician reported tailpipe fires on two consecutive days and expressed misgivings over maintenance actions on aircraft to correct the issues.