B757-200 diverts to an intermediate station for servicing of overflowing lavatories.

Attributes
ACN	789126
Time
Date	200806
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	789126
Person 2
Affiliation	company : air carrier
Function	flight attendant : on duty
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : company policies
Independent Detector	other other : 2
Resolutory Action	flight crew : diverted to another airport
Supplementary
Problem Areas	Company Aircraft
Primary Problem	Company

Narrative:

Flight attendant informed me that all lavatories were filling up with one in coach overflowing. Controling dispatcher notified by ACARS who coordination with maintenance control. Within 1 hour; all coach lavatories were overfull and blocked off. The first class lavatory was rapidly approaching overflow. With coordination with the dispatcher; the decision was made to divert to ZZZ as an unsanitary condition now existed with over 3 hours of flight time remaining. The flight was svced at ZZZ and proceeded to the original destination arriving 44 mins late. We believe that all lavatories were not dumped and/or oversvced in europe. The possibilities of a leak in the lavatory system and a problem with the lavatory servicing system also existed. Review lavatory servicing procedures with ground personnel. As there is no waste level gauge on the B757 it is next to impossible for the crew to identify an oversvced or potential overflow condition.

Original NASA ASRS Text

Title: B757-200 DIVERTS TO AN INTERMEDIATE STATION FOR SERVICING OF OVERFLOWING LAVATORIES.

Narrative: FLT ATTENDANT INFORMED ME THAT ALL LAVATORIES WERE FILLING UP WITH ONE IN COACH OVERFLOWING. CTLING DISPATCHER NOTIFIED BY ACARS WHO COORD WITH MAINT CTL. WITHIN 1 HR; ALL COACH LAVATORIES WERE OVERFULL AND BLOCKED OFF. THE FIRST CLASS LAVATORY WAS RAPIDLY APCHING OVERFLOW. WITH COORD WITH THE DISPATCHER; THE DECISION WAS MADE TO DIVERT TO ZZZ AS AN UNSANITARY CONDITION NOW EXISTED WITH OVER 3 HRS OF FLT TIME REMAINING. THE FLT WAS SVCED AT ZZZ AND PROCEEDED TO THE ORIGINAL DEST ARRIVING 44 MINS LATE. WE BELIEVE THAT ALL LAVATORIES WERE NOT DUMPED AND/OR OVERSVCED IN EUROPE. THE POSSIBILITIES OF A LEAK IN THE LAVATORY SYS AND A PROB WITH THE LAVATORY SVCING SYS ALSO EXISTED. REVIEW LAVATORY SVCING PROCS WITH GND PERSONNEL. AS THERE IS NO WASTE LEVEL GAUGE ON THE B757 IT IS NEXT TO IMPOSSIBLE FOR THE CREW TO IDENT AN OVERSVCED OR POTENTIAL OVERFLOW CONDITION.

Data retrieved from NASA's ASRS site as of May 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.