Date: 201704
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Light: Daylight
Aircraft: A300
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Cargo / Freight / Delivery
Flight phase: Taxi
ATC / advisory: Ground ZZZ
Aircraft component: Engine Starting System
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Dispatcher
Reporter qualification: Dispatch Dispatcher
Human factors: Workload; Confusion; Distraction
Anomaly: Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: Taxi
Result: Flight Crew Returned To Gate; Flight Crew Rejected Takeoff; General Maintenance Action
Contributing factors: Aircraft; Human Factors; Procedure
Primary problem: Human Factors

Narrative: Flight called on the phone wanting to add an MEL. It was a flagged item so a mechanic had to go out to the jet and do the proper paperwork to defer the item. The MEL added was... MEL 80-13-XX-XX: STARTER VALVE SYSTEM #2 INOP. The jet stayed on the taxiway next to the gate that they had just pushed from. The mechanic went out to the jet; did the proper maintenance procedure that the MEL required; completed the paperwork and added the MEL. The jet then proceeded to the runway. As it was getting ready to begin the takeoff roll someone (I am guessing that it was Maintenance Control but I was never told for sure) notified ATC that some of the paperwork for the added MEL was not correct. The jet aborted the takeoff; went back to the ramp; received the proper paperwork and departed. I think part of the error was that I hit the ACARS add maintenance button versus the add MEL button. I figured since the mechanic went out to the jet; did the paperwork and procedures that needed to be done; the jet was good to go. I did not know at that time that any of the paperwork was not completed correctly.I thought the procedure was completed correctly aside from myself sending the wrong ACARS to the flight crew. I should have sent 'MEL added' vs. '[maintenance] added'. The second reason which I really can't answer was due to the Maintenance mechanic not giving the correct paperwork to the flight crew when they were deferring the MEL item causing the aborted takeoff. That will have to be followed up with the mechanic who did the paperwork. I am not totally sure what to suggest. It was just an error on my part of hitting the wrong ACARS button. It was not done on purpose and I knew the MEL was a flagged item because maintenance went out to the jet to complete the proper procedure required by the MEL. I should have hit the 'add MEL' vs. the 'add [maintenance]'. In terms of the maintenance mechanic not giving the correct paperwork; I am not sure how that can be prevented. There needs to be follow-up with the Maintenance Control department for their input on how that can be prevented.




Synopsis: A300 Dispatcher reported entering the wrong ACARS code instead of indicating an MEL was added. That error resulted in an aborted takeoff and return to the gate for additional paperwork corrections before departing.