A321
Maintenance Airframe; Maintenance Avionics; Maintenance Powerplant
Troubleshooting; Time Pressure; Situational Awareness; Communication Breakdown; Workload
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors; Aircraft; MEL; Procedure
Aircraft X was ready to depart ZZZ. Mechanic called maintenance for a Class 2 Air Bleed message on ECAM; the CA (Captain) just wrote up. I issued MEL 36 XXX left wing loop B fault without checking history. I thought the aircraft was on a thru flight since it was way late in the afternoon. After the aircraft departed; a ZZZ Crew Chief called maintenance and informed maintenance that the aircraft was in ZZZ all night with a Drop Dead MEL 36XXX C/N XXXXXX L/PXXXXXXX. This aircraft did not make one flight without new fault. NO NEW MEL should have been issued.I did not look at history. I thought the aircraft was on a Thru FLT. Maintenance did not say anything about history; which is was just sign-off. I was in a hurry to dispatch the aircraft. I did not take a Class 2 maintenance message as a serious fault. Wing Loops do fault very often.Always review history and do not get in a hurry. Ask the Mechanic to also review the log book.
A321 Mechanic reported overlooking requirements for a MEL and allowing the aircraft to fly in an unairworthy condition.