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Technician reported unclear references in the aircraft maintenance manual resulted in replacing the wrong valve on an aircraft engine.
| Attributes | |
| ACN | 1748197 |
| Time | |
| Date | 202006 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 170/175 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pneumatic Valve/Bleed Valve |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
On the date of date me and another tech changed the high stage valve instead of the nacelle pressure shut of valve; when opening up the engine we mistake the high stage valve for the shut off valve due to the fact that they are identical and close to each; we used the ipc to confirm the correct part number; but we was looking at the high stage valve. We used the wrong ref amm 36-11-03 to change the high stage valve which we mistaken for the and nacelle shut off valve.in the amm ref put a detailed step stating that there are two of the same valves that is right next to each other that is the same part number.
Original NASA ASRS Text
Title: Technician reported unclear references in the Aircraft Maintenance Manual resulted in replacing the wrong valve on an aircraft engine.
Narrative: On the date of DATE me and another tech changed the high stage valve instead of the Nacelle pressure shut of valve; when opening up the engine we mistake the high stage valve for the shut off valve due to the fact that they are identical and close to each; we used the ipc to confirm the correct part number; but we was looking at the high stage valve. we used the wrong ref AMM 36-11-03 to change the high stage valve which we mistaken for the and nacelle shut off valve.In the AMM ref put a detailed step stating that there are two of the same valves that is right next to each other that is the same part number.
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.