B38M, Singapore Changi Singapore, 2021

B38M, Singapore Changi Singapore, 2021

Summary

On 3 December 2021, a Boeing 737MAX-8 released to service with antiskid and autobrake systems inoperative in accordance with Minimum Equipment List procedures then operated two sectors. On the return to Singapore, both left main landing gear tyres were sufficiently damaged during landing to cause the bursting of one and deflation of the other. The cause of this was failure to deploy the speedbrakes manually as required. A similar error on the previous sector did not have the same outcome because the relatively more positive touchdown enabled automatic speedbrake deployment and wheel spin was accompanied by simultaneous manual braking.

Description

On 3 December 2021, a Boeing 737MAX-8 (9V-MBF) being operated by Singapore Airlines on a scheduled international passenger flight from Phnom Penh to Singapore Changi and subject to an MMEL operating restriction due to malfunctioning of either the Antiskid Autobrake Control Unit (ABACUS) or the antiskid valve sustained left main landing gear tyre and related damage during landing in day VMC on a dry runway. This was only realised following an external inspection after arrival at the assigned terminal parking gate. 

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