<< >> NASA ASRS Report 656439, May 2005

A B737 first officer reported to captain that 1 engine had a hot inlet cowl. Engine had cowl anti-ice valve stuck open deferred per MEL. MEL special procedure with APU supplying air the engine bleed air switch must be off. Found on.

Attributes
ACN	656439
Time
Date	200505
Local Time Of Day	1201 To 1800
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	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 2000
ASRS Report	656439
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
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
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

We had an MEL on the aircraft for 1 anti-ice valve stuck open. After arriving at the gate and shutting down the engines; the outbound first officer; who had just done a walkaround; said the engine nacelle lips were hot on the side with the anti-ice valve stuck open. We turned off the APU bleed air to rectify the situation. Upon further review of the MEL; I found that the MEL procedure said that the engine bleed air switch should be turned off when APU air on and engines shut down. I think this was overlooked as the procedure was several pages after the MEL listing and was not readily apparent.

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Original NASA ASRS Text

Title: A B737 FO RPTED TO CAPT THAT 1 ENG HAD A HOT INLET COWL. ENG HAD COWL ANTI-ICE VALVE STUCK OPEN DEFERRED PER MEL. MEL SPECIAL PROC WITH APU SUPPLYING AIR THE ENG BLEED AIR SWITCH MUST BE OFF. FOUND ON.

Narrative: WE HAD AN MEL ON THE ACFT FOR 1 ANTI-ICE VALVE STUCK OPEN. AFTER ARRIVING AT THE GATE AND SHUTTING DOWN THE ENGS; THE OUTBOUND FO; WHO HAD JUST DONE A WALKAROUND; SAID THE ENG NACELLE LIPS WERE HOT ON THE SIDE WITH THE ANTI-ICE VALVE STUCK OPEN. WE TURNED OFF THE APU BLEED AIR TO RECTIFY THE SIT. UPON FURTHER REVIEW OF THE MEL; I FOUND THAT THE MEL PROC SAID THAT THE ENG BLEED AIR SWITCH SHOULD BE TURNED OFF WHEN APU AIR ON AND ENGS SHUT DOWN. I THINK THIS WAS OVERLOOKED AS THE PROC WAS SEVERAL PAGES AFTER THE MEL LISTING AND WAS NOT READILY APPARENT.

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.