<< >> NASA ASRS Report 554667, July 2002

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.

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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.