An hs-125-800 captain reported an air cycle machine producing a great deal of water which pooled in ...

Narrative:

I have seen too many could not duplicate/ops check good where the item in question is still inop over the last year. This morning is a blatant example. We had an early morning departure. With the APU running and the bleed on for a couple of minutes I preflighted the aft service bay. Water was literally pouring out of the acm ducting; pooling on a cover below and eventually flowing out of the airplane. When placing the write up in the log book I noticed a prior write up from two days prior. The write up was for no cabin airflow/unable to cool. It was signed off as could not duplicate. When the drain is clogged and water backs up in the system it freezes and cuts off the airflow. I honestly don't know how it would be possible for the mechanic to miss this. I sent a video of the water pouring out to maintenance control; and I have a copy of it in my iphone.

Original NASA ASRS Text

Title: An HS-125-800 Captain reported an air cycle machine producing a great deal of water which pooled in the aft service bay. When the drain is clogged and freezes over; cabin conditioned airflow is blocked. This anomaly was previously recorded but not repaired.

Narrative: I have seen too many could not duplicate/ops check good where the item in question is still inop over the last year. This morning is a blatant example. We had an early morning departure. With the APU running and the bleed on for a couple of minutes I preflighted the aft service bay. Water was literally pouring out of the ACM ducting; pooling on a cover below and eventually flowing out of the airplane. When placing the write up in the log book I noticed a prior write up from two days prior. The write up was for no cabin airflow/unable to cool. It was signed off as could not duplicate. When the drain is clogged and water backs up in the system it freezes and cuts off the airflow. I honestly don't know how it would be possible for the mechanic to miss this. I sent a video of the water pouring out to Maintenance Control; and I have a copy of it in my iPhone.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1199506
Time
Date	201408
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dawn
Aircraft 1
Make Model Name	BAe 125 Series 800
Flight Phase	Parked
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

An hs-125-800 captain reported an air cycle machine producing a great deal of water which pooled in the aft service bay. When the drain is clogged and freezes over; cabin conditioned airflow is blocked. This anomaly was previously recorded but not repaired.