Aviation Accident Summary CHI89IA083

MINNEAPOLIS, MN, USA

Aircraft #1

N434AA

MCDONNELL DOUGLAS DC-9-82

Probable Cause and Findings

FAILURE OF THE HYDRAULIC POWER TRANSFER UNIT SHUT-OFF (PTU S/O) VALVE DUE TO FAILED (FATIGUED) VALVE BODY ATTACH SCREWS.

 

Source: NTSB Aviation Accident Database

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