HeliHub.com maintains a detailed record of accidents and incidents, and trust that by making this information easily available. In a coincidence, two different Japanese operators managed to drop underslung loads from Super Puma helicopters within a week of each other.  Neither incident resulted in any injuries to persons, or damage to aircraft

Here are the safety page links from the relevant section of HeliHub.com – the former operated by Aero Asahi, and the latter by Naha Nihon Helicopter.

02-Oct-15 JA9678 Airbus AS332L1 Itoigawa, Japan
After unloaded the liquid concrete, the pilot mistakenly operated the cargo hook release switch and the empty bucket, the weight of which was about 210 kg, was dropped unintentionally at an altitude about 240 m AGL.

08-Oct-15 JA9660 Airbus AS332L Takahama Cho, Japan
A wooden frame, about 1.3 m by 0.5 m, was dropped unintentionally at an altitude about 170 m. The frame was found in a car park

John Burcote – HeliHub.com