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A B757-200 was dispatched in non compliance with 2 deferred items both in conflict with the MEL special procedures.
| Attributes | |
| ACN | 439857 |
| Time | |
| Date | 199906 |
| Day | Fri |
| 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 | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 439857 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : published procedure |
| Independent Detector | other other : 969 |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : testing performance deficiency : fault isolation performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft had been previously on jun/xa/99, had an MEL put on the center hydraulic quantity indication for the EICAS. Then on jun/xd/99 the center hydraulic system quantity reservoir light came on, so I put a placard for this light under MEL reference 29-13B. I didn't quite understand the MEL procedures for MEL 29-13 -- which had the mechanic also verify on the eidas, the indication for the quantity, which was on a different MEL placard jun/xa/99 under MEL reference 29-11. The thought it meant you could use either/or procedure to verify it.
Original NASA ASRS Text
Title: A B757-200 WAS DISPATCHED IN NON COMPLIANCE WITH 2 DEFERRED ITEMS BOTH IN CONFLICT WITH THE MEL SPECIAL PROCS.
Narrative: ACFT HAD BEEN PREVIOUSLY ON JUN/XA/99, HAD AN MEL PUT ON THE CTR HYD QUANTITY INDICATION FOR THE EICAS. THEN ON JUN/XD/99 THE CTR HYD SYS QUANTITY RESERVOIR LIGHT CAME ON, SO I PUT A PLACARD FOR THIS LIGHT UNDER MEL REF 29-13B. I DIDN'T QUITE UNDERSTAND THE MEL PROCS FOR MEL 29-13 -- WHICH HAD THE MECH ALSO VERIFY ON THE EIDAS, THE INDICATION FOR THE QUANTITY, WHICH WAS ON A DIFFERENT MEL PLACARD JUN/XA/99 UNDER MEL REF 29-11. THE THOUGHT IT MEANT YOU COULD USE EITHER/OR PROC TO VERIFY IT.
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.