Date: 201501
Local time of day: 1801-2400
Location: ZZZ.Airport, US
Light: Night
Aircraft: A320
Operator: Air Carrier
Operating under: Part 121
Mission: Passenger
Flight phase: Parked
Aircraft component: Electrical Wiring & Connectors
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Technician
Reporter qualification: Maintenance Powerplant; Maintenance Airframe
Human factors: Time Pressure; Workload; Communication Breakdown; Distraction
Anomaly: Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Diverted; General Maintenance Action
Contributing factors: Staffing; MEL; Aircraft; Chart Or Publication; Environment - Non Weather Related; Human Factors; Manuals
Primary problem: Manuals

Narrative: January 2015; I received a call from ZZZ Line Maintenance Technician X. An A320 Aircraft had a popped Circuit Breaker (C/B) L32; which was for Left gear brake fan. Technician X stated when C/B was pushed in; an [electrical] arc was seen on [Left] gear. ZZZ inspected the left gear conduit. I asked if the conduit was secure. He said it was secure; but with a burn mark. I said we need to contact engineering. We had a 3-way conference with company Engineer X. I had concerns from last year; many Airbus's had problems with landing gear conduits. I ask if we could dispatch aircraft in this condition. Engineer X checked his records and did not find any documents that we had to stop the aircraft. A Brake Steering Control Unit (BSCU) Bite check showed no faults. A review of MEL 32-48-01a; has no Maintenance (M) or Operations (O) procedures for this condition. C/B's L32-L35 were pulled and collared per Typical Repair (TR) 32-00-14; Brake Fan MEL 32-48-01a.On Takeoff out of ZZZ; A320 aircraft had an Auto Brake Fault. [Airbus] Web Airman showed Tachometer-1 fault. We had the aircraft divert to ZZZ1 for repairs; due to the fact it was going to a Non-maintenance station. Mechanics have pressure to move aircraft on Time. The aircraft was fully loaded and ready to go. The popped breaker was pulled and collared; but no thought was giving to other system wires damaged. Engineering was contacted. ZZZ did do a Bite check for other faults; but none found. We believed at the time the only damage was to the Brake Fan system. ZZZ1 maintenance found that the wire harness was damaged; which made Tachometer-1 fail. ZZZ1 [Maintenance] replaced the bad harness. The Airbus desk is very understaffed. Operations put great pressure on maintenance to move the aircraft. I have been told many times by dispatch; we do not change the Aircraft for maintenance convenience. The Typical Repair or the MEL should give more guidance [for] Landing Gear conduits. Maintenance Operations Center (MOC). Technician. Maintenance Control.




Synopsis: A Maintenance Controller reports how their understaffed Airbus desk and pressure by Operations to move aircraft 'On Time'; contributed to deferring and collaring a popped Brake Fan Circuit Breaker (C/B) for a Left Main Gear harness that had previously arced; left burn marks and a Tachometer-1 fault. Airbus A320 diverted after takeoff due to an Autobrake Fault.