A maintenance controller reports about correcting an MEL deferral on a B757-200; only to discover sh...

Attributes
ACN	941676
Time
Date	201104
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Cockpit Furnishing
Person 1
Function	Other / Unknown
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural MEL Deviation - Procedural Published Material / Policy

Narrative:

Local maintenance informed me that the correct MEL for a B757-200 deferral; item xyz; was 25-28A. I agreed with him and told him to change the MEL reference using [our maintenance computer entry change procedures]. The aircraft was already on a delay. The mechanic changed the MEL reference at and the aircraft departed six minutes later. Approximately twenty minutes later; it was determined that changing to MEL 25-28A caused deferral xyz to be 14-days overdue. It was too late when I discovered this and the aircraft had already departed. At this time; deferral xyz is assigned a high priority [going into] their destination upon arrival.

Original NASA ASRS Text

Title: A Maintenance Controller reports about correcting an MEL deferral on a B757-200; only to discover shortly after departure the correction actually caused the revised deferral to be 14-days overdue.

Narrative: Local Maintenance informed me that the correct MEL for a B757-200 deferral; item XYZ; was 25-28A. I agreed with him and told him to change the MEL reference using [our maintenance computer entry change procedures]. The aircraft was already on a delay. The Mechanic changed the MEL reference at and the aircraft departed six minutes later. Approximately twenty minutes later; it was determined that changing to MEL 25-28A caused deferral XYZ to be 14-days overdue. It was too late when I discovered this and the aircraft had already departed. At this time; deferral XYZ is assigned a High Priority [going into] their destination upon arrival.

Data retrieved from NASA's ASRS site as of April 2012 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.

A maintenance controller reports about correcting an MEL deferral on a B757-200; only to discover shortly after departure the correction actually caused the revised deferral to be 14-days overdue.