 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B747-400 in scheduled maintenance it was discovered during a pylon inspection that a forward engine mount was installed with 2 bearings missing.
| Attributes | |
| ACN | 477685 |
| Time | |
| Date | 199809 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| 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 : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 14 |
| ASRS Report | 477685 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : airframe technician : powerplant technician : inspection authority |
| 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 contributing factor : schedule pressure contributing factor : engineering procedure performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : inspection performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On sep/xa/98, worked on forward mount per air carrier specifications at that time. 2 bearings found missing on 'B' check.
Original NASA ASRS Text
Title: A B747-400 IN SCHEDULED MAINT IT WAS DISCOVERED DURING A PYLON INSPECTION THAT A FORWARD ENG MOUNT WAS INSTALLED WITH 2 BEARINGS MISSING.
Narrative: ON SEP/XA/98, WORKED ON FORWARD MOUNT PER ACR SPECS AT THAT TIME. 2 BEARINGS FOUND MISSING ON 'B' CHK.
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.