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Pc-12 captain reported improper MEL caused four flights of an aircraft with ahrs connectivity issues to fly in a non airworthy condition.
| Attributes | |
| ACN | 1748605 |
| Time | |
| Date | 202006 |
| Local Time Of Day | 0001-0600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | PC-12 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | AHRS/ND |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 30 Flight Crew Total 1300 Flight Crew Type 50 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural MEL Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft was meled for an ahrs connectivity issue on date and was legally deferred. It states there 'may be inoperative'. However; upon looking closer 1 ahrs is required for dispatch; meaning the MEL on date should of been a grounding issue. This was caught on date around xa:49 local. It was flown on date for four flights. Arrival airports were all VFR. Ultimately; confusion with the MEL layout played a factor as well as not being caught by maintenance when deferred via a phone call with them and some paperwork.
Original NASA ASRS Text
Title: PC-12 Captain reported improper MEL caused four flights of an aircraft with AHRS connectivity issues to fly in a non airworthy condition.
Narrative: Aircraft was MELed for an AHRS connectivity issue on DATE and was legally deferred. It states there 'may be inoperative'. However; upon looking closer 1 AHRS is required for dispatch; meaning the MEL on DATE should of been a grounding issue. This was caught on DATE around XA:49 local. It was flown on DATE for four flights. Arrival airports were all VFR. Ultimately; confusion with the MEL layout played a factor as well as not being caught by maintenance when deferred via a phone call with them and some paperwork.
Data retrieved from NASA's ASRS site 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.