<< >> NASA ASRS Report 151278, July 1990

Air carrier mechanic reports of a faulty chip detector being found in a jet engine that had been shut down in flight prior to inspection. Feels it was either a faulty detector because of wear or sabotage. In either event, it was not installed with any quality control being exercised.

Attributes
ACN	151278
Time
Date	199007
Day	Mon
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Controlling Facilities	tower : mmu
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Flight Phase	ground : preflight
Person 1
Affiliation	company : air carrier
Function	other personnel other other personnel other
Qualification	other other : other
ASRS Report	151278
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

A full flow chip detector was found out of the engine causing an in-flight shutdown. Detector was inspected and reinstalled the previous night. I found it to be virtually impossible to install the detector incorrectly and replaced its 'circlip'. The detector kept falling out, therefore, I feel it to be either a faulty, or worn detector. Possibly a chance of sabotage which I feel strongly about.

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Original NASA ASRS Text

Title: ACR MECHANIC REPORTS OF A FAULTY CHIP DETECTOR BEING FOUND IN A JET ENGINE THAT HAD BEEN SHUT DOWN IN FLT PRIOR TO INSPECTION. FEELS IT WAS EITHER A FAULTY DETECTOR BECAUSE OF WEAR OR SABOTAGE. IN EITHER EVENT, IT WAS NOT INSTALLED WITH ANY QUALITY CONTROL BEING EXERCISED.

Narrative: A FULL FLOW CHIP DETECTOR WAS FOUND OUT OF THE ENG CAUSING AN INFLT SHUTDOWN. DETECTOR WAS INSPECTED AND REINSTALLED THE PREVIOUS NIGHT. I FOUND IT TO BE VIRTUALLY IMPOSSIBLE TO INSTALL THE DETECTOR INCORRECTLY AND REPLACED ITS 'CIRCLIP'. THE DETECTOR KEPT FALLING OUT, THEREFORE, I FEEL IT TO BE EITHER A FAULTY, OR WORN DETECTOR. POSSIBLY A CHANCE OF SABOTAGE WHICH I FEEL STRONGLY ABOUT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.