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A B737-700 captain reports deferral for nose cowl anti-ice may not be correct. Believes report is on nose cowl anti-ice valve position light and not valve.
| Attributes | |
| ACN | 675655 |
| Time | |
| Date | 200510 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 170 flight time total : 16000 flight time type : 12000 |
| ASRS Report | 675655 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 215 flight time total : 6000 flight time type : 2000 |
| ASRS Report | 675657 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Dispatch release had MEL #30-3 for a #1 engine cowl anti-ice valve open. I checked the logbook and it appeared that maintenance had correctly MEL'ed the write-up. After departure; I was checking out the logbook and I noticed the write-up was for a cowl anti-ice valve illuminating on takeoff. I don't think this is deferrable. Since the aircraft had flown 9 legs after the deferral; I assumed the MEL was for the correct problem. I also assumed maintenance knew what they were doing and applied the correct MEL. Maybe they did; I'm not sure. Supplemental information from acn 675657: #1 engine anti-ice valve was deferred with valve wired open (MEL 30-3). Logbook and MEL appeared to be correct. After departure and further review of prior write-ups; it appears that the MEL was for the incorrect item. The cowl anti-ice light was written up; but the valve was MEL'ed.
Original NASA ASRS Text
Title: A B737-700 CAPT RPTS DEFERRAL FOR NOSE COWL ANTI-ICE MAY NOT BE CORRECT. BELIEVES RPT IS ON NOSE COWL ANTI-ICE VALVE POS LIGHT AND NOT VALVE.
Narrative: DISPATCH RELEASE HAD MEL #30-3 FOR A #1 ENG COWL ANTI-ICE VALVE OPEN. I CHKED THE LOGBOOK AND IT APPEARED THAT MAINT HAD CORRECTLY MEL'ED THE WRITE-UP. AFTER DEP; I WAS CHKING OUT THE LOGBOOK AND I NOTICED THE WRITE-UP WAS FOR A COWL ANTI-ICE VALVE ILLUMINATING ON TKOF. I DON'T THINK THIS IS DEFERRABLE. SINCE THE ACFT HAD FLOWN 9 LEGS AFTER THE DEFERRAL; I ASSUMED THE MEL WAS FOR THE CORRECT PROB. I ALSO ASSUMED MAINT KNEW WHAT THEY WERE DOING AND APPLIED THE CORRECT MEL. MAYBE THEY DID; I'M NOT SURE. SUPPLEMENTAL INFO FROM ACN 675657: #1 ENG ANTI-ICE VALVE WAS DEFERRED WITH VALVE WIRED OPEN (MEL 30-3). LOGBOOK AND MEL APPEARED TO BE CORRECT. AFTER DEP AND FURTHER REVIEW OF PRIOR WRITE-UPS; IT APPEARS THAT THE MEL WAS FOR THE INCORRECT ITEM. THE COWL ANTI-ICE LIGHT WAS WRITTEN UP; BUT THE VALVE WAS MEL'ED.
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.