EMB ERJ 170/175 ER/LR
Maintenance Airframe; Maintenance Powerplant
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Chart Or Publication; Aircraft; Manuals; Procedure
On the evening shift; I was assigned the borescope for an ITT (Indicated Turbine Temperature) exceedance. During the examination; I found that the ports for examining the LPT (Low Pressure Turbine) section 19 and 20 were seized. Knowing that I had to video the LPT in order to be able to complete the borescope; I used the path through the front side of the stage 2 HPT (High Pressure Turbine) blades to access the LPT stage 1 guide vanes and the stage 1 LPT Blades. I did not think that I needed to gain permission from GE to be able to look at the LPT from that angle. I was focused on finishing the borescope and did not think that I needed to DMI (Deferred Maintenance Item) the plugs as well. Perhaps a separate job card for the ITT exceedance [can be] created; which could include the details for examining the LPT as well as what to do if inspection ports 19 and 20 are found to be seized.
Inspector reported not following established procedures while borescoping an engine and failing to enter maintenance items in the electronic logbook.