Accident Yakovlev Yak-55 ZU-DSH, Monday 18 March 2024
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Date:Monday 18 March 2024
Time:09:30 UTC
Type:Silhouette image of generic YK55 model; specific model in this crash may look slightly different    
Yakovlev Yak-55
Owner/operator:Private
Registration: ZU-DSH
MSN: 880501
Total airframe hrs:370 hours
Fatalities:Fatalities: 0 / Occupants: 0
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Karoo Gateway Aerodrome (FABW) -   South Africa
Phase: Standing
Nature:Private
Departure airport:Beaufort West (FABW)
Destination airport:Bloemfontein/New Tempe (FATP)
Investigating agency: CAA S.A.
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The pilot on a Yak 55 aircraft with registration ZU-DSH had planned to conduct a private flight from Karoo Gateway Aerodrome (FABW) in Beaufort West to New Tempe Aerodrome (FATP) in Bloemfontein. Visual meteorological conditions (VMC) by day prevailed at the time of the flight.
The pilot stated that he completed the pre-flight inspection on the aircraft with no anomalies found. He then refuelled the aircraft to full capacity in preparation for the flight. Upon pre-setting the aircraft for an engine pre-start procedure, the pilot asked two people to assist him to exert power on the aircraft to keep it in position; this was to prevent it from moving as soon as the engine starts. The pilot intended to start the engine using the propeller hand-cranking method. This was due to an existing defect on the aircraft's engine start system. The pilot stated that the method was taught to him as an alternative to start the engine should he experience a challenge. At this stage, no person was on-board the aircraft, and the aircraft's parking brakes were not engaged. Moreover, there were no chocks placed on the main wheels to prevent the aircraft from rolling. The pilot successfully started the engine but because there was no person on-board the aircraft to control it, it rolled forward and impacted the fuel bay perimeter fence before the pilot had an opportunity to climb in and take control. The aircraft sustained substantial damage to the propeller, right main gear and the right-wing tip. No person was injured. The fuel bay perimeter fence was also damaged.


Probable Cause(s)
The aircraft's engine was started using an unapproved procedure which resulted in the aircraft rolling forward and impacting the fuel bay perimeter fence.

Contributing Factor(s)
1. The landing gear brakes were not engaged as per the engine start procedure.
2. The cockpit was not occupied at the time of engine start.
3. Disregard of the regulations and the manufacturer-approved aircraft starting procedures.

Accident investigation:
cover
  
Investigating agency: CAA S.A.
Report number: CA18/2/3/10432
Status: Investigation completed
Duration: 2 months
Download report: Final report

Sources:

SACAA

Location

Revision history:

Date/timeContributorUpdates
22-May-2024 17:25 ASN Added
22-May-2024 17:27 ASN Updated [Aircraft type, Operator, Total occupants, Phase, Departure airport, Destination airport, Narrative]

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