|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601-1200|
|Make Model Name||B737-800|
|Operating Under FAR Part||Part 121|
|Aircraft Component||Intake Ice System|
|Function||Other / Unknown|
|Anomaly||Aircraft Equipment Problem Critical|
Deviation - Procedural Maintenance
Deviation - Procedural MEL
Deviation - Procedural FAR
Deviation - Procedural Published Material / Policy
As the B737-800 aircraft was ready for departure; pilot reports left engine cowl anti-ice valve light on. I called maintenance control from jet bridge to placard the valve in the 'open' position per MEL 30-3B. I performed maintenance procedures manual (mpm); but did not disconnect pressure switch connector. Also; did not placard high stage bleed air module and shut-off (second officer) valve; because I was never instructed by maintenance control to do so. Aircraft had an air interrupt later; with cowl anti-ice valve (light) 'on.' after aircraft came back; I disconnected connector from pressure switch and another mechanic placarded inop the high stage bleed air module and shut-off valve per MEL.
Original NASA ASRS Text
Title: A Mechanic and Maintenance Controller report on their involvement with a B737-800 left engine Anti-Ice Valve incomplete MEL deferral; that caused an Air Turnback.
Narrative: As the B737-800 aircraft was ready for departure; pilot reports left engine Cowl Anti-Ice Valve light on. I called Maintenance Control from Jet Bridge to placard the valve in the 'open' position per MEL 30-3B. I performed Maintenance Procedures Manual (MPM); but did not disconnect Pressure Switch connector. Also; did not placard High Stage Bleed Air Module and Shut-off (S/O) valve; because I was never instructed by Maintenance Control to do so. Aircraft had an Air Interrupt later; with Cowl Anti-Ice valve (light) 'on.' After aircraft came back; I disconnected connector from Pressure switch and another Mechanic Placarded inop the High Stage Bleed Air Module and Shut-off valve per MEL.
Data retrieved from NASA's ASRS site as of April 2012 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.