A B757's forward potable water fill valve door did not close completely allowing water to siphon in ...

Attributes
ACN	842119
Time
Date	200906
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Service/Access Door
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine Flight Crew Flight Engineer
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 20000 Flight Crew Type 11000
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

Heard a thud followed by a constant vibration of the airplane. Engine instruments indicated a high reading of the #2 engine N1 vibes; indicating severe damage to the engine. Using the severe engine damage checklist; the right engine was shut down. As we had already started our descent; we just continued and landed with one engine out; without incident. Investigation on the ground revealed that the forward water fill valve had not been closed. Our guess was the water was siphoning out of that fill valve; found a large piece of ice; which eventually broke off and passed through the #2 engine; engine appeared to be totally destroyed. Corrective action: 1) don't ever use the forward fill valve on the 757 always use the rear one. 2) make it so that the water fill valve door cannot be closed unless the valve handle is in the closed; or off position. 3) if any pilot suspects that the fill valve was not closed correctly (i.e.; cannot get water our of the spigot); and that is coupled with the fact that the water quantity is dropping; make recommendation to land as soon as practical.

Original NASA ASRS Text

Title: A B757's forward potable water fill valve door did not close completely allowing water to siphon in flight. The water's slipstream apparently formed an ice block; which subsequently broke off damaging the number two engine in flight. An engine out landing was completed.

Narrative: Heard a thud followed by a constant vibration of the airplane. Engine instruments indicated a high reading of the #2 engine N1 vibes; indicating severe damage to the engine. Using the severe engine damage checklist; the right engine was shut down. As we had already started our descent; we just continued and landed with one engine out; without incident. Investigation on the ground revealed that the forward water fill valve had not been closed. Our guess was the water was siphoning out of that fill valve; found a large piece of ice; which eventually broke off and passed through the #2 engine; engine appeared to be totally destroyed. Corrective action: 1) Don't ever use the forward fill valve on the 757 always use the rear one. 2) Make it so that the water fill valve door cannot be closed unless the valve handle is in the closed; or off position. 3) If any pilot suspects that the fill valve was not closed correctly (i.e.; cannot get water our of the spigot); and that is coupled with the fact that the water quantity is dropping; make recommendation to land as soon as practical.

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.