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Emj crew returned to the departure gate with moisture condensation on the inside of the cockpit windows.
| Attributes | |
| ACN | 612699 |
| Time | |
| Date | 200403 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Embraer Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 612699 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | other |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Heavy condensation in cockpit. Start up began normally. APU was pwring packs prior to engine start. After engine start, packs were re-engaged. Warm air began pouring out of the vents causing cockpit windows to fog up. I stopped the aircraft on ramp to evaluate the problem when 'heavy' condensation began pouring out of the vents. It was so heavy, we both thought it was smoke, but it did not smell like smoke. Cockpit visibility was about 2 ft. The condensation or whatever it was, was almost odorless, but was warm. We secured both packs. I asked the flight attendant if we there were any problems in the cabin. She answered, no. With the packs secured, the visibility in the cockpit began clearing fairly quickly. After a couple mins, the windows were defogged enough to allow taxiing. After discussing it with my first officer and maintenance, we returned to gate. The #1 pack was MEL'ed and we resumed our flight.
Original NASA ASRS Text
Title: EMJ CREW RETURNED TO THE DEP GATE WITH MOISTURE CONDENSATION ON THE INSIDE OF THE COCKPIT WINDOWS.
Narrative: HVY CONDENSATION IN COCKPIT. START UP BEGAN NORMALLY. APU WAS PWRING PACKS PRIOR TO ENG START. AFTER ENG START, PACKS WERE RE-ENGAGED. WARM AIR BEGAN POURING OUT OF THE VENTS CAUSING COCKPIT WINDOWS TO FOG UP. I STOPPED THE ACFT ON RAMP TO EVALUATE THE PROB WHEN 'HVY' CONDENSATION BEGAN POURING OUT OF THE VENTS. IT WAS SO HVY, WE BOTH THOUGHT IT WAS SMOKE, BUT IT DID NOT SMELL LIKE SMOKE. COCKPIT VISIBILITY WAS ABOUT 2 FT. THE CONDENSATION OR WHATEVER IT WAS, WAS ALMOST ODORLESS, BUT WAS WARM. WE SECURED BOTH PACKS. I ASKED THE FLT ATTENDANT IF WE THERE WERE ANY PROBS IN THE CABIN. SHE ANSWERED, NO. WITH THE PACKS SECURED, THE VISIBILITY IN THE COCKPIT BEGAN CLRING FAIRLY QUICKLY. AFTER A COUPLE MINS, THE WINDOWS WERE DEFOGGED ENOUGH TO ALLOW TAXIING. AFTER DISCUSSING IT WITH MY FO AND MAINT, WE RETURNED TO GATE. THE #1 PACK WAS MEL'ED AND WE RESUMED OUR FLT.
Data retrieved from NASA's ASRS site as of July 2007 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.