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A curtis C46 was operated in training flts with the DME system inoperative and deferred in conflict with the MEL.
| Attributes | |
| ACN | 409666 |
| Time | |
| Date | 199807 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | C-46 Commando |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 409666 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure non adherence : far |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
New aircraft type just added to part 121 certificate. Aircraft DME was removed from aircraft and sent out for repair. Aircraft was scheduled for training flight. I was asked to defer the DME. At this time the MEL had not been approved for this aircraft. I was unaware of this fact. The last deferred maintenance item (dmi) I performed was approximately 12 months ago. I was not familiar with the proper procedure. I found the procedure in the company maintenance manual. There was no mention of the MEL on this page. I filled out the logbook, non routine form, and dmi form, and placarded the aircraft. I did not list an MEL number on the log sheet. With no approved MEL, the item cannot be dmi'ed. I should have sought out instruction on current company procedures on how to dmi a piece of equipment. The DME was reinstalled on the aircraft 2 days later, at which point the improper dmi was discovered. No revenue flts were made during this time.
Original NASA ASRS Text
Title: A CURTIS C46 WAS OPERATED IN TRAINING FLTS WITH THE DME SYS INOP AND DEFERRED IN CONFLICT WITH THE MEL.
Narrative: NEW ACFT TYPE JUST ADDED TO PART 121 CERTIFICATE. ACFT DME WAS REMOVED FROM ACFT AND SENT OUT FOR REPAIR. ACFT WAS SCHEDULED FOR TRAINING FLT. I WAS ASKED TO DEFER THE DME. AT THIS TIME THE MEL HAD NOT BEEN APPROVED FOR THIS ACFT. I WAS UNAWARE OF THIS FACT. THE LAST DEFERRED MAINT ITEM (DMI) I PERFORMED WAS APPROX 12 MONTHS AGO. I WAS NOT FAMILIAR WITH THE PROPER PROC. I FOUND THE PROC IN THE COMPANY MAINT MANUAL. THERE WAS NO MENTION OF THE MEL ON THIS PAGE. I FILLED OUT THE LOGBOOK, NON ROUTINE FORM, AND DMI FORM, AND PLACARDED THE ACFT. I DID NOT LIST AN MEL NUMBER ON THE LOG SHEET. WITH NO APPROVED MEL, THE ITEM CANNOT BE DMI'ED. I SHOULD HAVE SOUGHT OUT INSTRUCTION ON CURRENT COMPANY PROCS ON HOW TO DMI A PIECE OF EQUIP. THE DME WAS REINSTALLED ON THE ACFT 2 DAYS LATER, AT WHICH POINT THE IMPROPER DMI WAS DISCOVERED. NO REVENUE FLTS WERE MADE DURING THIS TIME.
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.