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A B737-300 was dispatched in non compliance with a deferred left #4 eyebrow window inner pane shattered in conflict with the MEL.
| Attributes | |
| ACN | 554667 |
| Time | |
| Date | 200207 |
| 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 | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 554667 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : published procedure non adherence : far |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On 07/tue/02, aircraft X remained overnight at ZZZ for pmv with a scheduled L-4 window removal and replacement due to a shattered inner pane. Window heat was rendered inoperative. Shattered window was on maintenance note. Window heat was placed on MEL at the time the window was maintenance noted. Looking at air carrier X MEL procedure 30-11, note: 'cracked or delaminated windows are not deferrable using MEL relief contact maintenance control for maintenance manual procedures. Will determine aircraft airworthiness.' I feel we did use MEL relief. In this case, it would make sense to me that it was intended that window heat be operative on a window that has some damage. This would help the window be less susceptible to further damage. Maintenance control was contacted on the phone and said this is common practice by some master operator MEL by boeing.
Original NASA ASRS Text
Title: A B737-300 WAS DISPATCHED IN NON COMPLIANCE WITH A DEFERRED L #4 EYEBROW WINDOW INNER PANE SHATTERED IN CONFLICT WITH THE MEL.
Narrative: ON 07/TUE/02, ACFT X REMAINED OVERNIGHT AT ZZZ FOR PMV WITH A SCHEDULED L-4 WINDOW REMOVAL AND REPLACEMENT DUE TO A SHATTERED INNER PANE. WINDOW HEAT WAS RENDERED INOP. SHATTERED WINDOW WAS ON MAINT NOTE. WINDOW HEAT WAS PLACED ON MEL AT THE TIME THE WINDOW WAS MAINT NOTED. LOOKING AT ACR X MEL PROC 30-11, NOTE: 'CRACKED OR DELAMINATED WINDOWS ARE NOT DEFERRABLE USING MEL RELIEF CONTACT MAINT CTL FOR MAINT MANUAL PROCS. WILL DETERMINE ACFT AIRWORTHINESS.' I FEEL WE DID USE MEL RELIEF. IN THIS CASE, IT WOULD MAKE SENSE TO ME THAT IT WAS INTENDED THAT WINDOW HEAT BE OPERATIVE ON A WINDOW THAT HAS SOME DAMAGE. THIS WOULD HELP THE WINDOW BE LESS SUSCEPTIBLE TO FURTHER DAMAGE. MAINT CTL WAS CONTACTED ON THE PHONE AND SAID THIS IS COMMON PRACTICE BY SOME MASTER OPERATOR MEL BY BOEING.
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.