 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B747-400 engine low pressure turbine modified rotating seal was allowed by the parts computer to be logged on to an unmodified engine.
| Attributes | |
| ACN | 561150 |
| Time | |
| Date | 200112 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 16.5 |
| ASRS Report | 561150 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : inspection performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Company Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | ENG OVERHALL MANUAL |
Narrative:
On dec/tue/01, I on logged a 'G' confign T-4 rotating airseal to an lpt module X. Part number of airseal was 51n038 and the serial number was X. All the newly on logged parts were 'G' confign, so I followed suit. It turned out that the 5TH stage disk was left on the module not off logged and it was 'F confign. The inspector prior to me that on logged the 1ST configured part should have checked for proper confign but he didn't.
Original NASA ASRS Text
Title: A B747-400 ENG LOW PRESSURE TURBINE MODIFIED ROTATING SEAL WAS ALLOWED BY THE PARTS COMPUTER TO BE LOGGED ON TO AN UNMODIFIED ENG.
Narrative: ON DEC/TUE/01, I ON LOGGED A 'G' CONFIGN T-4 ROTATING AIRSEAL TO AN LPT MODULE X. PART NUMBER OF AIRSEAL WAS 51N038 AND THE SERIAL NUMBER WAS X. ALL THE NEWLY ON LOGGED PARTS WERE 'G' CONFIGN, SO I FOLLOWED SUIT. IT TURNED OUT THAT THE 5TH STAGE DISK WAS LEFT ON THE MODULE NOT OFF LOGGED AND IT WAS 'F CONFIGN. THE INSPECTOR PRIOR TO ME THAT ON LOGGED THE 1ST CONFIGURED PART SHOULD HAVE CHKED FOR PROPER CONFIGN BUT HE DIDN'T.
Data retrieved from NASA's ASRS site as of July 2007 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.