Accident CSA PS-28 Cruiser EC-NKP, Monday 10 January 2022
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Date:Monday 10 January 2022
Type:Silhouette image of generic CRUZ model; specific model in this crash may look slightly different    
CSA PS-28 Cruiser
Registration: EC-NKP
MSN: C0661
Year of manufacture:2020
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Casarrubios del Monte Airfield (LEMT) -   Spain
Phase: Take off
Departure airport:Toledo-Casarrubios Del Monte Airport (LEMT)
Destination airport:Madrid-Cuatro Vientos Airport (ECV/LECU)
Investigating agency: CIAIAC
Confidence Rating: Accident investigation report completed and information captured
The aircraft took off from Casarrubios del Monte on an instructional flight to Cuatro Vientos Airport in Madrid.
At around 11:30 local time, the aircraft began the takeoff run from runway 26, with flaps in takeoff configuration and maximum power. According to the statements of the instructor and the student, immediately after starting the takeoff run, the wheel of the right main gear leg came off and rolled forward. The crew stopped the aircraft immediately and reported the event to the airfield to stop operations.

Causes/contributing factors
The accident suffered by the EC-NKP aircraft was caused by the deterioration, due to loss of torque, of the threaded joint between the wheel hub and inner and outer wheel rims after three tyre change operations (procedure 8.5.1 Tire Change in the Maintenance Manual). The degradation of the assembly generated fatigue in two of the three bolts, which eventually fractured, causing the right main landing gear wheel to detach.
A failure to explicitly state that the self-locking nuts can not be reused in the maintenance instructions for the assembly and disassembly of this threaded joint provided in procedure 8.5.1 Tire Change of the Maintenance Manual is considered to be a contributing factor.

Accident investigation:
Investigating agency: CIAIAC
Report number: A-003/2022
Status: Investigation completed
Duration: 10 months
Download report: Final report

Sources: (photo)

Revision history:

22-Jan-2022 13:23 harro Added
22-Jan-2022 20:47 RobertMB Updated [Cn, Other fatalities, Location, Departure airport, Source]

Corrections or additions? ... Edit this accident description

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