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Mechanic was informed he failed to collar the left engine start circuit breakers (C/B) he had previously pulled while prepping an emb-145 aircraft for a boroscope inspection.
| Attributes | |
| ACN | 1008464 |
| Time | |
| Date | 201204 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Engine Starting System |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
I was prepping the aircraft for a borescope inspection of the left engine. I pulled the engine start circuit breakers (C/B) as per the aircraft maintenance manual (amm) to make the aircraft safe prior to performing the maintenance task; but forgot to collar the circuit breakers. I went to the cockpit to check the temperature of the left engine from the EICAS. I pulled the breakers (C/bs) as required by the amm for safetying the engine for maintenance; but then got involved in removing the cowlings; shifting equipment and cooling the engine to below required minimum temperatures to enable the borescope to occur. I did not return to the cockpit to attach maintenance 'do not close' C/B collars as I should have. The only response is follow procedures as outlined in the amm. The task in the amm states to pull the required circuit breakers/install safety collars.
Original NASA ASRS Text
Title: Mechanic was informed he failed to collar the Left Engine Start Circuit Breakers (C/B) he had previously pulled while prepping an EMB-145 aircraft for a Boroscope Inspection.
Narrative: I was prepping the aircraft for a Borescope Inspection of the left engine. I pulled the Engine Start Circuit Breakers (C/B) as per the Aircraft Maintenance Manual (AMM) to make the aircraft safe prior to performing the maintenance task; but forgot to collar the Circuit Breakers. I went to the cockpit to check the temperature of the left engine from the EICAS. I pulled the Breakers (C/Bs) as required by the AMM for safetying the engine for maintenance; but then got involved in removing the cowlings; shifting equipment and cooling the engine to below required minimum temperatures to enable the borescope to occur. I did not return to the cockpit to attach maintenance 'Do Not Close' C/B collars as I should have. The only response is follow procedures as outlined in the AMM. The task in the AMM states to pull the required Circuit Breakers/install safety collars.
Data retrieved from NASA's ASRS site as of July 2013 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.