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A B767-300 was dispatched in non compliance with the left engine fan reverser deferred in conflict with the MEL.
| Attributes | |
| ACN | 523233 |
| Time | |
| Date | 200108 |
| Day | Sun |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Controlling Facilities | tower : mia.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 523233 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | other other : 969 |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : manuals performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On the morning of aug/xa/01, ZZZ maintenance called and informed me that while accomplishing special items card, on the left thrust reverser, the resistance check of the M966 micro switch pack was out of limits. ZZZ maintenance asked if they could placard the thrust reverser inoperative and lock it out per MEL 78-01. I pulled up the copy of job card that was on my maintenance check manual and red supplemental information book and saw nothing stating that I could not put the reverser on MEL. ZZZ maintenance had an advanced action copy of job card, but did not inform me that on pages 2 and 13, there was an MEL requirements block which stated that the thrust reverser could not be placarded inoperative for failing that step of the check. With the information available to me at the time, I saw no reason not to placard the reverser under the MEL, since it is supposed to be locked out per the mpm, which should prevent an inadvertent deployment.
Original NASA ASRS Text
Title: A B767-300 WAS DISPATCHED IN NON COMPLIANCE WITH THE L ENG FAN REVERSER DEFERRED IN CONFLICT WITH THE MEL.
Narrative: ON THE MORNING OF AUG/XA/01, ZZZ MAINT CALLED AND INFORMED ME THAT WHILE ACCOMPLISHING SPECIAL ITEMS CARD, ON THE L THRUST REVERSER, THE RESISTANCE CHK OF THE M966 MICRO SWITCH PACK WAS OUT OF LIMITS. ZZZ MAINT ASKED IF THEY COULD PLACARD THE THRUST REVERSER INOP AND LOCK IT OUT PER MEL 78-01. I PULLED UP THE COPY OF JOB CARD THAT WAS ON MY MAINT CHK MANUAL AND RED SUPPLEMENTAL INFO BOOK AND SAW NOTHING STATING THAT I COULD NOT PUT THE REVERSER ON MEL. ZZZ MAINT HAD AN ADVANCED ACTION COPY OF JOB CARD, BUT DID NOT INFORM ME THAT ON PAGES 2 AND 13, THERE WAS AN MEL REQUIREMENTS BLOCK WHICH STATED THAT THE THRUST REVERSER COULD NOT BE PLACARDED INOP FOR FAILING THAT STEP OF THE CHK. WITH THE INFO AVAILABLE TO ME AT THE TIME, I SAW NO REASON NOT TO PLACARD THE REVERSER UNDER THE MEL, SINCE IT IS SUPPOSED TO BE LOCKED OUT PER THE MPM, WHICH SHOULD PREVENT AN INADVERTENT DEPLOYMENT.
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.