EMB ERJ 145 ER/LR
Maintenance Airframe; Maintenance Powerplant
Communication Breakdown; Situational Awareness
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft Aircraft Damaged; General Maintenance Action
Manuals; MEL; Procedure; Aircraft; Chart Or Publication; Human Factors; Logbook Entry
I issued Configuration Deviation List (CDL) CDL 32-1 and CDL 32-2 mistakenly; due to having to have the [Main Landing Gear (MLG)] doors removed due to lightning strike damage on them. At the same time; I was looking into limitations in the Structural Repair Manual (SRM) of the damage to both the fairing and the door. I noticed that the [MLG] door could not have allowable delamination and was informing the Mechanics X and Y [in ZZZ1] of this reference. I also at that time overlooked the important rule of it being two systems because of how it is worded in the SRM; as they both have two different functions. I am aware of this now and it will not occur again.I believe that this occurred because in the CDL Manual the wording is one; as a fairing and the other as a door. If; in the CDL they list do not remove MLG fairing; if MLG door is also removed; then I believe I would have noticed this and it would have prevented me from allowing this [CDL] to be issued. Also if the computer lock would have engaged preventing this from being issued then it would have stopped it also. I am now aware of this being same system and was accidental.
Basically; the error went through several hands beginning with the midnight Dispatcher giving his initials for two Configuration Deviation List (CDL) [deferrals for] parts of the same system. Neither the Midnight Dispatch nor the Maintenance Controller at the time caught it and then the aircraft flew four flights.I suggest that Maintenance Control's system have a flag or automation that prevents the input of two CDL's on the same part. Or; that this is included in the CDL verbiage 'Warning' against the issuing of the other CDL. Failure of the midnight Dispatcher and Maintenance Control to catch the error of issuing CDL's 33-2 and 32-1; of which only one part of one system [CDL is allowed] per Embraer's CDL list; Section 3-02; under limitations Paragraph 4. Aircraft was swapped [after] another Dispatcher caught the discrepancy.
A Maintenance Controller and two Aircraft Dispatchers report about improperly applying two Configuration Deviation List (CDL) deferrals on the Main Landing Gear (MLG) doors of an EMB-145 aircraft for lightning strike damage.