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After their crj-200 aircraft had departed; two aircraft maintenance technicians realized they had installed a new carbon seal o-ring at the wrong location on # 1 engine integrated drive generator. # 1 engine lost all oil in flight. Distraction; inadequate and easy to misinterpret maintenance diagrams; work interruptions from management; lack of training and experience and a slow on-line maintenance manual program were noted as contributors.
| Attributes | |
| ACN | 1291474 |
| Time | |
| Date | 201508 |
| Local Time Of Day | 1201-1800 |
| 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 Plan | IFR |
| Component | |
| Aircraft Component | Engine Oil Seals |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Inflight Event / Encounter Other / Unknown |
Narrative:
August 2015. In ZZZ; myself aircraft maintenance technician (amt X) and amt Y; during a service check found a leak from the integrated drive generator (idg) on the left-hand engine. While changing the idg carbon seal; documents and references were misunderstood. The distractions inside the hangar aided in misplacement of the o-ring. The work interruptions from management distracted us from the task at hand. We preformed the leak check and operational check and found everything to be within limits. Nothing seemed unusual and we signed off the aircraft. The following day; it was brought to our attention we had placed the o-ring in the wrong place. While we were discussing this; the aircraft lost oil from the left engine and made an emergency landing.I would suggest more descriptive [maintenance] illustrations. A new warning added to the maintenance manual; or internal document added. Availability to faster; more reliable access to manuals. Better training on (idg) carbon seal replacement.
Original NASA ASRS Text
Title: After their CRJ-200 aircraft had departed; two Aircraft Maintenance Technicians realized they had installed a new carbon seal O-Ring at the wrong location on # 1 Engine Integrated Drive Generator. # 1 Engine lost all oil in flight. Distraction; inadequate and easy to misinterpret maintenance diagrams; work interruptions from Management; lack of training and experience and a slow on-line Maintenance Manual program were noted as contributors.
Narrative: August 2015. In ZZZ; myself Aircraft Maintenance Technician (AMT X) and AMT Y; during a Service Check found a leak from the Integrated Drive Generator (IDG) on the Left-hand Engine. While changing the IDG carbon seal; documents and references were misunderstood. The distractions inside the Hangar aided in misplacement of the O-Ring. The work interruptions from Management distracted us from the task at hand. We preformed the Leak Check and Operational Check and found everything to be within limits. Nothing seemed unusual and we signed off the aircraft. The following day; it was brought to our attention we had placed the O-Ring in the wrong place. While we were discussing this; the aircraft lost oil from the Left Engine and made an emergency landing.I would suggest more descriptive [maintenance] illustrations. A new Warning added to the Maintenance Manual; or internal document added. Availability to faster; more reliable access to manuals. Better training on (IDG) carbon seal replacement.
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.