Partly, but not entirely. The May schedule was thrown off due a tailstrike on VT-ESO that wound up with her being grounded in LAX for almost 3 weeks. Then VT-AIM wound up with a lavatory problem that led to a forced overnight followed soon after by a radome issue on VT-AIM again that led to another forced overnight. With VT-AIM as the only DEL based 747 (the only other DEL based longhaul a/c are 777s), a single delay affects the AI 137/136 route for a week since the aircraft is on a 6-day captive rotation. VT-AIM also had to make a diversion to YWG sometime during June. Then VT-AIL wound up coming into LAX for an engine change and most recently VT-EVJ is grounded in LAX due to a hydraulics problem.

Largely just bad luck on the LAX flights recently. Nothing else in the system comes even close to producing reliability numbers this horrendous.