American Eagle E145 at Chicago on Jun 3rd 2011, brake separated during roll out

Last Update: November 8, 2012 / 12:28:15 GMT/Zulu time

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Incident Facts

Date of incident
Jun 3, 2011

Classification
Incident

Flight number
MQ-4176

Aircraft Registration
N607AE

Aircraft Type
Embraer ERJ-145

ICAO Type Designator
E145

An American Eagle Embraer ERJ-145, registration N607AE performing flight MQ-4176 from Columbus,OH to Chicago O'Hare,IL (USA) with 49 passengers and 3 crew, landed and rolled out on O'Hare's runway 22R when the tower controller queried whether the aircraft had blown a tyre on landing. The aircraft vacated the runway and taxied to the holding pad runway 32R to check the tower's observation, the captain opened the right hand door, saw smoke from the right hand gear and leaking hydraulic fluid. The crew shut the engines down and had the aircraft towed to the gate.

A subsequent inspection of runway 22R found and recovered parts of a brake that had separated just south of the intersection with taxiway U.

The NTSB reported that parts of the number #3 (inboard right) brake had disintegrated and separated. The operator was asked to quarantine the brake and separated parts for further detailed investigation, the new brake was installed on the aircraft.

On Sep 22nd 2012 the NTSB released their factual report without providing an actual reason of why parts of the brake had disintegrated and separated, but focussed on the maintenance procedures to examine the brake's carbon disc for oxidation. The manufacturer had issued a plastic tool to perform a detailed visual inspection (DVI) which involved a sharp plastic stick (or finger nail) to detect oxidation of the carbon disc. The NTSB reported that 5 of 5 mechanics in 5 facilities did not have the plastic tool and were not aware of the DVI procedures. The brakes manufacturer subsequently performed training at the facilities and revised their documentation to clarify the DVI requirements. The operators maintenance facilities have all been equipped with the tool.

On Nov 8th 2012 the NTSB released their final report reporting, that five brakes assemblies including three of other occurrences had been shipped to the manufacturer for examination with all 5 assemblies having been found with oxidation of varying degrees, and concluding the probable cause was:

The overheat and failure the brake during landing due to oxidation of the brake rotors, which went undetected by maintenance personnel. Contributing to the accident was maintenance personnelÂ’s lack of familiarity with detailed brake oxidation inspection procedures.
Incident Facts

Date of incident
Jun 3, 2011

Classification
Incident

Flight number
MQ-4176

Aircraft Registration
N607AE

Aircraft Type
Embraer ERJ-145

ICAO Type Designator
E145

This article is published under license from Avherald.com. © of text by Avherald.com.
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