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An md-80 flight crew returned to their departure airport for maintenance when they were unable to control the pressurization following takeoff.
| Attributes | |
| ACN | 974438 |
| Time | |
| Date | 201110 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Inflight Event / Encounter Other / Unknown |
Narrative:
While taking off; we had the auto transfer lockout standby blue light illuminate. We went through the proper QRH procedures; but nothing helped. We had erratic pressure changes from 1;500 FPM up to 1;500 FPM down. Manual procedures did not help. We asked for vectors and safe terrain clearance while we dealt with this abnormality. Dispatch and maintenance control recommended we return to our departure airport. We declared an emergency and landed without further problems.they found a broken line and clamp the next day. This exact issue had history. The captain that wrote this same issue up was very detailed in the problems he encountered. We need better maintenance awareness for the issue.
Original NASA ASRS Text
Title: An MD-80 flight crew returned to their departure airport for maintenance when they were unable to control the pressurization following takeoff.
Narrative: While taking off; we had the auto transfer lockout standby blue light illuminate. We went through the proper QRH procedures; but nothing helped. We had erratic pressure changes from 1;500 FPM up to 1;500 FPM down. Manual procedures did not help. We asked for vectors and safe terrain clearance while we dealt with this abnormality. Dispatch and Maintenance Control recommended we return to our departure airport. We declared an emergency and landed without further problems.They found a broken line and clamp the next day. This exact issue had history. The Captain that wrote this same issue up was very detailed in the problems he encountered. We need better Maintenance awareness for the issue.
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.