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A dhc-8-300 was dispatched and operated with an invalid deferred item that was applicable only to a dhc-8-200.
| Attributes | |
| ACN | 637419 |
| Time | |
| Date | 200411 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 13000 flight time type : 10000 |
| ASRS Report | 637419 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | maintenance problem : non compliance with mel non adherence : published procedure non adherence : far |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : detected after the fact |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Flight Crew Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Took over aircraft in ZZZ for round-trip flight to ZZZ1 and back. Had only short breaks until past XA00 so grabbed some breakfast and took it to the plane. We did our preflight and I saw in the maintenance log that the de-ice boot system had a boot inflation light that remained on. The write-up and MEL signoff were done correctly. I always try and take time to pull out my MEL manual and verify that the correct actions, both pilot and maintenance procedure, were done correctly. I knew that the lights could be MEL'ed, so did not check my manual. The next day, I again flew the same aircraft on the same route with the same write-up and MEL. On day #3 of my trip, one of our capts pulled me aside and told me that the MEL was correct for a dhc-8-100/200, but only good for a dhc-8-300 if both inboard de-ice inflation lights worked normally. Well, the aircraft I flew was a 300 and the light that was remaining on was the left inboard, therefore, the MEL was invalid.
Original NASA ASRS Text
Title: A DHC-8-300 WAS DISPATCHED AND OPERATED WITH AN INVALID DEFERRED ITEM THAT WAS APPLICABLE ONLY TO A DHC-8-200.
Narrative: TOOK OVER ACFT IN ZZZ FOR ROUND-TRIP FLT TO ZZZ1 AND BACK. HAD ONLY SHORT BREAKS UNTIL PAST XA00 SO GRABBED SOME BREAKFAST AND TOOK IT TO THE PLANE. WE DID OUR PREFLT AND I SAW IN THE MAINT LOG THAT THE DE-ICE BOOT SYS HAD A BOOT INFLATION LIGHT THAT REMAINED ON. THE WRITE-UP AND MEL SIGNOFF WERE DONE CORRECTLY. I ALWAYS TRY AND TAKE TIME TO PULL OUT MY MEL MANUAL AND VERIFY THAT THE CORRECT ACTIONS, BOTH PLT AND MAINT PROC, WERE DONE CORRECTLY. I KNEW THAT THE LIGHTS COULD BE MEL'ED, SO DID NOT CHK MY MANUAL. THE NEXT DAY, I AGAIN FLEW THE SAME ACFT ON THE SAME RTE WITH THE SAME WRITE-UP AND MEL. ON DAY #3 OF MY TRIP, ONE OF OUR CAPTS PULLED ME ASIDE AND TOLD ME THAT THE MEL WAS CORRECT FOR A DHC-8-100/200, BUT ONLY GOOD FOR A DHC-8-300 IF BOTH INBOARD DE-ICE INFLATION LIGHTS WORKED NORMALLY. WELL, THE ACFT I FLEW WAS A 300 AND THE LIGHT THAT WAS REMAINING ON WAS THE L INBOARD, THEREFORE, THE MEL WAS INVALID.
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.