Accident MBB BK 117A-3 ZK-IED,
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ASN Wikibase Occurrence # 195171
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Date:Tuesday 2 May 2017
Time:c. 11:30 LT
Type:Silhouette image of generic BK17 model; specific model in this crash may look slightly different    
MBB BK 117A-3
Owner/operator:Precision Helicopters
Registration: ZK-IED
MSN: 7059
Year of manufacture:1985
Total airframe hrs:11512 hours
Fatalities:Fatalities: 0 / Occupants: 1
Aircraft damage: Destroyed
Location:Pauatahanui Inlet, Wellington 2 -   New Zealand
Phase: En route
Nature:External load operation
Departure airport:Motukaraka Point
Destination airport:
Investigating agency: TAIC
Confidence Rating: Accident investigation report completed and information captured
While carrying under slung telegraph poles The pilot was forced to ditch his aircraft in the waters of Porirua Harbour after a vibration developed and a loss of tail rotor control developed. A witness reported the cable had broken and contacted the tail rotor. The pilot struggled to undo his harness and egressed from underwater and survived. The pilot was the only one onboard, and escaped with minor injuries. The helicopter was damaged beyond repair in the incident.

On 22 December 2017 the NZCAA issued a Continuing Airworthiness Notice concerning matters discovered in the ongoing Transport Accident Investigation Commission inquiry, namely " significant anomalies with the maintenance and engineering practices applied to the accident helicopter" and in particular life limited parts.

1. No mechanical failures were found that would have likely contributed to the accident.
2. The directional control of the helicopter was lost, likely due to unanticipated right yaw.
3. Operational pressure likely increased the risk of the pilot becoming distracted.
4. There were a number of significant anomalies in the maintenance records for the helicopter that were left unresolved at the time the CAA issued a certificate of airworthiness for the helicopter. None of these anomalies was a factor contributing to the accident.
5. The helicopter had not undergone all of the inspections and verification of maintenance tasks required before it was issued with a certificate of airworthiness.
6. There were a number of maintenance anomalies with other aircraft owned or operated by Helipro prior to the accident.
7. The CAA policies, processes and procedures for issuing certificates of airworthiness for imported second-hand aircraft did not have the robustness of a good-quality management system.

Accident investigation:
Investigating agency: TAIC
Report number: 
Status: Investigation completed
Duration: 3 years 1 month
Download report: Final report



27 November 2014 at Palmerston North (c) Roy Blewett

Revision history:

02-May-2017 01:57 angels one five Added
02-May-2017 02:14 angels one five Updated [Location, Departure airport]
02-May-2017 07:02 Aerossurance Updated [Time, Aircraft type, Registration, Cn, Location, Source]
02-May-2017 07:08 Aerossurance Updated [Operator, Phase, Nature, Source, Narrative]
02-May-2017 07:10 Aerossurance Updated [Narrative]
03-May-2017 07:34 harro Updated [Photo, ]
05-May-2017 08:35 Aerossurance Updated [Embed code]
05-May-2017 08:38 Aerossurance Updated [Source]
09-Sep-2017 10:46 TB Updated [Aircraft type]
24-Dec-2017 15:24 Aerossurance Updated [Operator, Source, Narrative]
10-May-2018 03:52 Iceman 29 Updated [Embed code]
18-May-2018 03:17 Ron Averes Updated [Location, Embed code]
21-Oct-2020 16:22 Tyler Theriault Updated [Damage]
06-May-2021 06:42 Anon. Updated [Damage]
04-Oct-2021 11:52 Anon. Updated [Damage, Narrative]
13-Feb-2022 01:55 Ron Averes Updated [Location]
07-Aug-2023 08:46 harro Updated [[Location]]
14-Nov-2023 09:52 harro Updated [Other fatalities]
05-Dec-2023 20:40 harro Updated [Other fatalities]

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