A300
Maintenance Airframe; Maintenance Powerplant
Maintenance Lead Technician 10; Maintenance Technician 15
Situational Awareness; Communication Breakdown; Confusion
Aircraft Equipment Problem Less Severe; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Human Factors; Manuals; Procedure
Aircraft arrived at gate with pilot report of inadvertent gear down overspeed of 280 knots at 11;000ft. After consulting with Maintenance Control representative; a Vmo/MMO Inspection was complied with due to Aircraft Maintenance Manual (AMM) defines an overspeed as speed in excess of Vmo +20kts. Maintenance Control Technical checked for an overspeed condition using ACARS playback and found aircraft had no overspeed condition on flight leg reported. As crew report had only a 10 knots overspeed Maintenance Control advised no other action was required. When aircraft arrived at base; aircraft was re-inspected In Accordance With (IAW) Aircraft Maintenance Manual (AMM) for a landing gear down overspeed inspection; no damage was found on re-inspection. Conflicting AMM references as to what is an overspeed condition and AMM does not reference aircraft configuration at time of overspeed.
A line Aircraft Maintenance Technician (AMT) describes how conflicting Aircraft Maintenance Manual (AMM) references contributed to a landing gear 'Down' overspeed inspection not being accomplished on an A300 aircraft.