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An SF340 was dispatched with a door seal missing per the MEL; but incorrect MEL applied. Crew discovered on cruise check aircraft was pressurized.
| Attributes | |
| ACN | 700275 |
| Time | |
| Date | 200606 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 700275 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 700274 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : repair performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | MEL |
Narrative:
MEL 21-9 cabin pressure control system method 3 was applied for a cabin door seal that fell off. The MEL indicates that the 'flight is conducted unpressurized at or below 10000 ft MSL.' upon conducting the cruise check it occurred to us that the cabin was in fact pressurized. Upon arrival; I consulted maintenance control and it was determined that MEL 21-8 should in fact have been the MEL applied. Maintenance came and rectified the situation by applying MEL 21-8.
Original NASA ASRS Text
Title: AN SF340 WAS DISPATCHED WITH A DOOR SEAL MISSING PER THE MEL; BUT INCORRECT MEL APPLIED. CREW DISCOVERED ON CRUISE CHK ACFT WAS PRESSURIZED.
Narrative: MEL 21-9 CABIN PRESSURE CTL SYS METHOD 3 WAS APPLIED FOR A CABIN DOOR SEAL THAT FELL OFF. THE MEL INDICATES THAT THE 'FLT IS CONDUCTED UNPRESSURIZED AT OR BELOW 10000 FT MSL.' UPON CONDUCTING THE CRUISE CHK IT OCCURRED TO US THAT THE CABIN WAS IN FACT PRESSURIZED. UPON ARR; I CONSULTED MAINT CTL AND IT WAS DETERMINED THAT MEL 21-8 SHOULD IN FACT HAVE BEEN THE MEL APPLIED. MAINT CAME AND RECTIFIED THE SITUATION BY APPLYING MEL 21-8.
Data retrieved from NASA's ASRS site as of January 2009 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.