A maintenance technician; after performing maintenance on a bombardier crj-200 reported that a tool ...

Narrative:

While working on the number 2 display fan I was using a small pair of vice-grips to hold an adel clamp in position. After numerous attempts and orientations I was unable to get the fasteners to align with the current setup. I then removed the vice-grips to attempt a new technique and I failed to remove them for the insulation blanket that I had them resting on. The tooling was discovered by a different maintenance crew while working on the #1 display fan replacement a few days later.the location of the number 2 display fan and the access panel it is accessed through is too small for the average person to fit inside to work. The orientation required allows the mechanic to either look at the area or to get a hand on the area; not both at the same time. After orienting myself numerous times over the course of the job and struggling with the install; I overlooked the tooling that I had placed out of the way; but within reach should I have needed it again.upon being notified; I have taken actions to shadow my tool box better to ensure that I don't make the same mistake again. [Suggest] around the clock inspectors to inspect panels/compartments after work has been performed to give the 'ok to close' approval. Require removal/replacement of parts to require dual signatures to ensure that a second set of eyes clears the compartment that was opened.

Original NASA ASRS Text

Title: A Maintenance Technician; after performing maintenance on a Bombardier CRJ-200 reported that a tool left behind was discovered by another maintenance crew.

Narrative: While working on the Number 2 display fan I was using a small pair of vice-grips to hold an Adel clamp in position. After numerous attempts and orientations I was unable to get the fasteners to align with the current setup. I then removed the vice-grips to attempt a new technique and I failed to remove them for the insulation blanket that I had them resting on. The tooling was discovered by a different maintenance crew while working on the #1 display fan replacement a few days later.The location of the Number 2 display fan and the access panel it is accessed through is too small for the average person to fit inside to work. The orientation required allows the mechanic to either look at the area or to get a hand on the area; not both at the same time. After orienting myself numerous times over the course of the job and struggling with the install; I overlooked the tooling that I had placed out of the way; but within reach should I have needed it again.Upon being notified; I have taken actions to shadow my tool box better to ensure that I don't make the same mistake again. [Suggest] around the clock inspectors to inspect panels/compartments after work has been performed to give the 'OK to Close' approval. Require removal/replacement of parts to require dual signatures to ensure that a second set of eyes clears the compartment that was opened.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1539221
Time
Date	201804
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

A maintenance technician; after performing maintenance on a bombardier crj-200 reported that a tool left behind was discovered by another maintenance crew.