<< >> NASA ASRS Report 850872, September 2009

B757 flight crew noticed that center tank boost pumps are on and not inhibited prior to engine start and assumed it must be normal. Once at cruise altitude the manual was consulted and the pumps should have been inhibited with no engines running.

Attributes
ACN	850872
Time
Date	200909
Local Time Of Day	1801-2400
Place
Locale Reference	MIA.Airport
State Reference	FL
Environment
Light	Night
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Fuel Booster Pump
Person 1
Function	Pilot Flying First Officer
Person 2
Function	Captain Pilot Not Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

At gate departure; just prior to engine start; captain noticed and brought to my attention that both center fuel pumps were selected on and not inhibited; (both pressurized with only one generator source available; the APU). The captain incorrectly believed that this was normal. During pushback; got very busy; tried to remember my fuel systems review from memory; and incorrectly agreed that only 1 generator source could power both center fuel pumps. After level off in flight; and systems review on my efb; both the captain and I agreed along with discussion in flight with maintenance control; that we should have returned to the gate to have maintenance look over situation.

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Original NASA ASRS Text

Title: B757 flight crew noticed that center tank boost pumps are on and not inhibited prior to engine start and assumed it must be normal. Once at cruise altitude the manual was consulted and the pumps should have been inhibited with no engines running.

Narrative: At gate departure; just prior to engine start; Captain noticed and brought to my attention that both center fuel pumps were selected on and not inhibited; (both pressurized with only one generator source available; the APU). The Captain incorrectly believed that this was normal. During pushback; got very busy; tried to remember my fuel systems review from memory; and incorrectly agreed that only 1 generator source could power both center fuel pumps. After level off in flight; and systems review on my EFB; both the Captain and I agreed along with discussion in flight with Maintenance Control; that we should have returned to the gate to have maintenance look over situation.

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.