Boeing Company Long Beach Div BOEING MD-11 PH-MCW

Summary

On 31 August 2013 at about 01:10 local time, a Boeing Company Long Beach Div BOEING MD-11 registered PH-MCW, operated by Martinair Holland N.V., was involved in an incident near Aguadilla, United States. The number of people on board was not recorded. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

31 August 2013 at 01:10

Classification

Incident

Location

Aguadilla, United States

Nearest airport

Rafael Hernandez (BQN)

Coordinates

18.4947, -67.1294

Aircraft

Boeing Company Long Beach Div BOEING MD-11

Registration

PH-MCW

Category

Airplane

Year built

1998

Operator

Martinair Holland N.V.

Operating rule

Part 129: Foreign

Phase of flight

Not recorded

Route

Aguadilla → London

Aircraft damage

Minor

Weather

Unk

Light

Night/Dark

NTSB number

ENG13IA036

Injuries not recorded.

an insufficiently robust flange attachment hardware design, which failed to contain engine components that were liberated during an LPT mechanical failure, resulting in engine/nacelle uncontainment. A factor in the incident was the lack of a module-level LPT inspection and the lack of an inspection requirement to detect/monitor the LPT S4 for advanced sulfidation attack.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

Four LPT stage 4 (S4) vane clusters weakened by an undetected sulfidation/corrosion attack disengaged at their inner attachment. The disengaged clusters displaced aft and contacted the S4 blades during operation. The contact machined a groove into the blade leading edges near the platforms. High cycle fatigue cracks initiating in the machined area of several blades propagated to overload separation. The blade liberation led to the separation of the remaining S4 blades and extensive downstream LPT blade and vane cluster damage. A large amount of metal debris was released into the gas path, loading the engine casings. The P-flange attachment hardware separated in overload, resulting in engine uncontainment.

Quoted verbatim from the NTSB record.