Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Ground Event / Encounter Other / Unknown
General Maintenance Action
Airport
After push back and disconnect in LAX; I attempted to taxi the aircraft but could not get aircraft to move despite using the most power allowed per procedure. Apparently there is a hole or depression in the asphalt that is well known to the ramp tower but perhaps not our push crews. This is dangerous as a crew unfamiliar or distracted could use too much power and damage equipment or seriously injure someone. This needs to be repaired or a disconnect spot painted on the ramp.
After pushback and engine start; tug was disconnected; area cleared. Called for taxi and Captain (IOE) attempted to Taxi. I advised Captain of the maximum N1 thrust and what the book said if we could not achieve breakaway with these thrust settings. After several attempts; we were unable to achieve taxi. We stopped; parked the brakes and called operations for a tow. Upon receiving a tow forward about 15 feet; the tug driver informed us we had been sitting in a 'hole' that has been getting progressively larger. They were already aware of this; but inadvertently parked in it. This hole is located around spot 2. We pushed out to taxi out C9 alleyway. We were towed forward and proceeded to taxi normally. We broke away from ramp with less than 35 percent thrust. This needs to be fixed. This will occur again. An unsuspecting Captain or a tired one will inadvertently apply too much thrust and may end up damaging something behind them. It obviously is not a new hole.
Air carrier flight crew reports a depression in the C9 Alley way near Spot 2 at LAX; that traps a stationary aircraft preventing it from moving with maximum allowable congested area thrust.