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Mdt PIC reports conflicting interpretation of minimum equipment list regarding aircraft equipment problem.
| Attributes | |
| ACN | 148272 |
| Time | |
| Date | 199006 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lns |
| State Reference | PA |
| Altitude | agl bound lower : 0 agl bound upper : 500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : lns tracon : bdl |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 210 flight time total : 23000 flight time type : 210 |
| ASRS Report | 148272 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
| Situations | |
| Publication | Unspecified |
Narrative:
On landing at lns the aircraft's altitude preselect windows was giving erroneous warnings. On contacting maintenance they said it was ok per MEL. In my opinion, the MEL was wrong or there was a typing error. It said, '# of units installed-1, # required for flight-1.' subsequent notes: 'before deactivation see aircraft flight manual for operation and procedures.' there were no procedures in aircraft flight manual, so this was strange. Also, after deactivation aircraft must be placarded by maintenance. Maintenance said the normal maintenance placard for write-ups was sufficient; I disagree. The bad part of the MEL (part 3) says that if the system (GPWS) fails, you can fly aircraft as many legs as you want. My opinion is that parts 1 and 2 must be complied with before you can use part 3.
Original NASA ASRS Text
Title: MDT PIC REPORTS CONFLICTING INTERP OF MINIMUM EQUIPMENT LIST REGARDING ACFT EQUIPMENT PROBLEM.
Narrative: ON LNDG AT LNS THE ACFT'S ALT PRESELECT WINDOWS WAS GIVING ERRONEOUS WARNINGS. ON CONTACTING MAINT THEY SAID IT WAS OK PER MEL. IN MY OPINION, THE MEL WAS WRONG OR THERE WAS A TYPING ERROR. IT SAID, '# OF UNITS INSTALLED-1, # REQUIRED FOR FLT-1.' SUBSEQUENT NOTES: 'BEFORE DEACTIVATION SEE ACFT FLT MANUAL FOR OPERATION AND PROCS.' THERE WERE NO PROCS IN ACFT FLT MANUAL, SO THIS WAS STRANGE. ALSO, AFTER DEACTIVATION ACFT MUST BE PLACARDED BY MAINT. MAINT SAID THE NORMAL MAINT PLACARD FOR WRITE-UPS WAS SUFFICIENT; I DISAGREE. THE BAD PART OF THE MEL (PART 3) SAYS THAT IF THE SYS (GPWS) FAILS, YOU CAN FLY ACFT AS MANY LEGS AS YOU WANT. MY OPINION IS THAT PARTS 1 AND 2 MUST BE COMPLIED WITH BEFORE YOU CAN USE PART 3.
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.