While removing the #1 engine forward mount bolt to secure a lock tap on a B737-300 aircraft; the engine shifted; resulting in the removal of the engine for inspection.

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Attributes
ACN	782332
Time
Date	200802
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	782332
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	performance deficiency : repair performance deficiency : scheduled maintenance
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

I removed forward engine mount bolt to secured lock tap. In result engine shifted; resulting the removal of engine for inspection. I should have stayed focus of tasks at hand.

Original NASA ASRS Text

Title: WHILE REMOVING THE #1 ENGINE FORWARD MOUNT BOLT TO SECURE A LOCK TAP ON A B737-300 ACFT; THE ENG SHIFTED; RESULTING IN THE REMOVAL OF THE ENGINE FOR INSPECTION.

Narrative: I REMOVED FORWARD ENG MOUNT BOLT TO SECURED LOCK TAP. IN RESULT ENG SHIFTED; RESULTING THE REMOVAL OF ENG FOR INSPECTION. I SHOULD HAVE STAYED FOCUS OF TASKS AT HAND.

Data retrieved from NASA's ASRS site as of May 2009 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.