No fatalities

Freight Loading Error Results in Weight Discrepancy During Approach (ZK-TLK)

Sydney Airport, New South Wales

On December 17, 2016, a The Boeing Company 737-476SF (registration ZK-TLK) was involved in an aviation accident near Sydney Airport, New South Wales. No fatalities were reported. Investigators recorded the probable cause as: These findings should not be read as apportioning blame or liability to any particular organisation or individual. This summary draws on records from the Australian Transport Safety Bureau (ATSB).

Sourcesthe Australian Transport Safety Bureau (ATSB)Primary reportUpdated 2026-07-04Data APIEditorial standards
Aircraft registered ZK-TLK
Aircraft registered ZK-TLK. Photo: Bahnfrend / CC BY-SA 4.0, via Wikimedia Commons

A loading supervisor misdirected lower compartment freight between two aircraft, causing one to be heavier than planned. The pilot entered a lower zero-fuel weight, leading to a slower approach speed and increased nose attitude.

Background

Several changes to the planned loading of the aircraft were communicated to the loading supervisor on the afternoon and evening of the incident. The loading supervisor incorporated the initial change to the lower compartment freight into their ramp report and communicated the plan to the staff. When the loading supervisor was notified that an aircraft swap would occur in Sydney, they were on the tarmac and performed a manual update to their ramp report. However, their manual update did not include the change in parking bay numbers.

Incident Details

The loading supervisor referred to their ramp report to direct the loading of the lower compartment freight planned for TLK and JTQ. The staff loading the upper compartments referred to their load instruction reports, which had the correct parking bays. At this time, the supervisor’s attention was divided between the freight loading activities and the overall progress of the loading of both aircraft against the approaching airport curfew time. Consequently, the supervisor directed the planned lower compartment freight for TLK to JTQ, and the planned lower compartment freight for JTQ to TLK.

Flight Operations

The pilot of TLK reported that the aircraft’s flight management computer determines the airspeed to be flown on final approach based on aircraft weight. They entered a zero-fuel weight into the flight management computer based on the planned load, which was less than the actual load. Therefore, the target airspeed flown was slower than required for the actual weight of the aircraft. As a result, the aircraft nose attitude increased in order to produce sufficient lift to maintain the approach flight path.

Frequently asked questions

What happened in the 17 Dec 2016 The Boeing Company 737-476SF accident near Sydney Airport, New South Wales?

A loading supervisor misdirected lower compartment freight between two aircraft, causing one to be heavier than planned. The pilot entered a lower zero-fuel weight, leading to a slower approach speed and increased nose attitude.

Were there any fatalities in the 17 Dec 2016 The Boeing Company 737-476SF accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 17 Dec 2016 involved a The Boeing Company 737-476SF, registration ZK-TLK, at Sydney Airport, New South Wales.

What was the probable cause of the accident?

These findings should not be read as apportioning blame or liability to any particular organisation or individual. The loading supervisor made a manual change to their ramp report but did not include a change to the aircraft parking bay numbers; this resulted in them directing the lower compartment freight for TLK to…