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Two mechanics report about how pressure and distractions to make an aircraft release schedule contributed to their missing a step in the crj-200 maintenance manual; requiring a clearance check of the nose landing gear (nlg) proximity sensors; after replacing the upper and lower steering torque links. Gear swing was not required. Nlg failed to retract; causing an air turnback.
| Attributes | |
| ACN | 917333 |
| Time | |
| Date | 201011 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Regional Jet 200 ER/LR (CRJ200) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Nose Gear |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural FAR Deviation - Procedural Published Material / Policy |
Narrative:
The crj-200 aircraft was in the hanger for (nose landing gear) nlg vibration at xa:00 pm when we arrived at work. Dayshift was working the aircraft and changing the torque links until xb:30 pm until mechanic Y and I received a [work] turnover. (Typically this procedure takes about four hours) I only mention this because the aircraft's release time of xc:30 pm was set. So at xc:00 pm; the lead [mechanic] approaches us and asks if the plane is going to make the xc:30pm flight (no it didn't). Now the pressure begins. [We had] the lead and maintenance control asking 'how much longer?' suddenly other mechanics arrive to help us downjack the plane as soon as it looks like we are done. Steps were missed and I failed to set the targets for the proximity system. So when the aircraft took off; the nlg failed to retract causing an air return. The maintenance manual does not call for a gear swing. This would have prevented the incident.
Original NASA ASRS Text
Title: Two mechanics report about how pressure and distractions to make an aircraft release schedule contributed to their missing a step in the CRJ-200 Maintenance Manual; requiring a Clearance Check of the Nose Landing Gear (NLG) Proximity sensors; after replacing the upper and lower steering Torque Links. Gear swing was not required. NLG failed to retract; causing an air turnback.
Narrative: The CRJ-200 aircraft was in the hanger for (Nose Landing Gear) NLG vibration at XA:00 pm when we arrived at work. Dayshift was working the aircraft and changing the Torque Links until XB:30 pm until Mechanic Y and I received a [work] turnover. (Typically this procedure takes about four hours) I only mention this because the aircraft's Release time of XC:30 pm was set. So at XC:00 pm; the Lead [Mechanic] approaches us and asks if the plane is going to make the XC:30pm flight (no it didn't). Now the pressure begins. [We had] the Lead and Maintenance Control asking 'how much longer?' Suddenly other mechanics arrive to help us downjack the plane as soon as it looks like we are done. Steps were missed and I failed to set the Targets for the Proximity System. So when the aircraft took off; the NLG failed to retract causing an air return. The Maintenance Manual does not call for a gear swing. This would have prevented the incident.
Data retrieved from NASA's ASRS site as of April 2012 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.