 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A lead inspector and a mechanic report finding a B737-700 cfm-56 left engine with clips/shims missing on the fan blade dovetails during a 'C' check.
| Attributes | |
| ACN | 860191 |
| Time | |
| Date | 200911 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Fan Disc |
| Person 1 | |
| Function | Inspector |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
Accomplished cfm-56 fan blade; disk and disk dovetail slot cleaning; inspection and relubrication; (using) our maintenance task job card. Found shims missing from blades on #1 engine. There was no shims left off. If shims were taken off they were put back on. Before that; the maintenance task (mt) job card was done online and the entire (fan blade) ship-set was replaced.possibly; when blades were taken off and replaced; shims were taken off with old blades. I don't remember if fan disk was marked or not. Paper work on maintenance task job card under the 'note' section; talks about shims and says; 'if' installed. Did not catch shims not installed; but positive they were not left off.
Original NASA ASRS Text
Title: A Lead Inspector and a Mechanic report finding a B737-700 CFM-56 left engine with clips/shims missing on the fan blade dovetails during a 'C' Check.
Narrative: Accomplished CFM-56 fan blade; disk and disk dovetail slot cleaning; inspection and relubrication; (using) our Maintenance Task Job Card. Found Shims missing from blades on #1 engine. There was no shims left off. If shims were taken off they were put back on. Before that; the maintenance task (MT) job card was done online and the entire (Fan blade) ship-set was replaced.Possibly; when blades were taken off and replaced; shims were taken off with old blades. I don't remember if fan disk was marked or not. Paper work on maintenance task job card under the 'Note' section; talks about shims and says; 'if' installed. Did not catch shims not installed; but positive they were not left off.
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.