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In an effort to cool-off a very hot cabin interior prior to removing seat rows 12-28 on a B757-200; a sheetmetal technician opens an overwing exit hatch to pull in a hangar air conditioning duct without checking to see if the overwing slide deactivation procedures had been accomplished. Slide deployed. Fatigue; excessive heat and assumptions were contributors.
| Attributes | |
| ACN | 962184 |
| Time | |
| Date | 201107 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Emergency Exit |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Experience | Maintenance Technician 20 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
I am a sheetmetal technician and I was assigned to remove passenger cabin seat rows 12-26. The aircraft had just been pulled into the hangar for maintenance. The aircraft cabin was very hot due to an inoperative hangar aircraft air conditioning (AC) unit. A repair request was initiated and it was fixed in about 15-minutes. My intent was to open the forward overwing exit hatch to pull the AC duct into the cabin to start cooling-off the cabin prior to pulling the seats. I'm familiar and accustomed to working with the B737 aircraft without overwing slides and in my haste; due to being overheated; I opened the overwing hatch without thinking and checking to see if the B757 overwing escape slide deactivation procedures had been accomplished.
Original NASA ASRS Text
Title: In an effort to cool-off a very hot cabin interior prior to removing seat Rows 12-28 on a B757-200; a Sheetmetal Technician opens an Overwing Exit Hatch to pull in a hangar air conditioning duct without checking to see if the Overwing Slide Deactivation Procedures had been accomplished. Slide deployed. Fatigue; excessive heat and assumptions were contributors.
Narrative: I am a Sheetmetal Technician and I was assigned to remove passenger Cabin Seat Rows 12-26. The aircraft had just been pulled into the hangar for maintenance. The aircraft cabin was very hot due to an inoperative hangar aircraft Air Conditioning (AC) unit. A repair request was initiated and it was fixed in about 15-minutes. My intent was to open the Forward Overwing Exit Hatch to pull the AC duct into the cabin to start cooling-off the cabin prior to pulling the seats. I'm familiar and accustomed to working with the B737 aircraft without Overwing Slides and in my haste; due to being overheated; I opened the Overwing Hatch without thinking and checking to see if the B757 Overwing Escape Slide Deactivation Procedures had been accomplished.
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.