ISS Daily Summary Report – 01/14/15

Ammonia Leak False Alarm:  This morning at 3:58am CST, ISS telemetry indicated a possible leak of ammonia within Node 2 in the US Segment.  The crew performed emergency procedures and subsequently evacuated the US Segment and isolated themselves to the Russian Segment. The External Thermal Control System (ETCS) Loop B, Node 2 Low Temperature Loop (LTL), and various pieces of equipment in Node 2, Node 3, JEM, and Columbus modules were shut down as a result to this event.

Ground teams worked throughout the day to analyze the telemetry signatures. It was determined that the event was triggered by an erroneous indication from the Node 2-2 Multiplexer/Demultiplexer (MDM).  The MDM has since been power cycled and the telemetry which caused the initial event is confirmed to be within normal limits.  At approximately 2:06pm CST, the Crew ingressed the US Segment wearing protective ammonia masks and tested the atmosphere as a precaution.  No indications of ammonia were detected. Flight Control Teams are working towards recovering Loop B and activating equipment that was powered down as a result of the initial response.

Today’s Planned Activities
Today’s activities were deferred as a result of the anomaly.

Ground Activities

  • Safeing and recovery of systems

Three-Day Look Ahead:

  • Thursday, 01/15: Loop B Reactivation, MICRO-5, Fruit Fly Ops, SPHERES Conference, Airway Monitoring, EpiGenetics Prep, BD2 Control Panel H/O
  • Friday, 01/16: TBD, Replanning in process
  • Saturday, 01/17: TBD, Replanning in process

QUICK ISS Status – Environmental Control Group:







[СКВ] 1 – SM Air Conditioner System (“SKV1”)


[СКВ] 2 – SM Air Conditioner System (“SKV2”)


Carbon Dioxide Removal Assembly (CDRA) Lab


Carbon Dioxide Removal Assembly (CDRA) Node 3


Major Constituent Analyzer (MCA) Lab


Major Constituent Analyzer (MCA) Node 3


Oxygen Generation Assembly (OGA)


Urine Processing Assembly (UPA)


Trace Contaminant Control System (TCCS) Lab


Trace Contaminant Control System (TCCS) Node 3

Full up