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When the flight crew of an A320 attempted to resolve a green hyd system 1 low pressure ECAM; they discovered a discrepancy between the ECAM checklist and the more complete procedure in their flight manual as far as utilizing the ptu to extend the landing gear. They declared an emergency; landed safely and was towed to a gate after a 30 minute delay.
| Attributes | |
| ACN | 1017906 |
| Time | |
| Date | 201206 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Hydraulic System |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 250 Flight Crew Total 18000 Flight Crew Type 8000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
During cruise; we got a green hyd engine 1 low presure ECAM. All other systems were normal. We accomplished the procedure and then contacted dispatch and maintenance control. There appeared to be a discrepancy between the ECAM checklist and the aom checklist that we referenced after accomplishing the ECAM. As I recall; the ECAM directed us to restore the ptu [power transfer unit] in order to lower the landing gear. The aom gave no such direction. Since our green system quantity was almost zero; turning the ptu back on didn't seem to make sense. Maintenance control agreed; and we left the ptu off for the rest of the flight. I briefed the flight attendents; declared an emergency and we landed in ZZZ. Because we had to gravity extend the landing gear; we had no nose wheel steering or normal brakes but backup systems worked as advertised. We did; however; have to wait for approximately 20 minutes to get towed off the runway.
Original NASA ASRS Text
Title: When the flight crew of an A320 attempted to resolve a Green Hyd System 1 low pressure ECAM; they discovered a discrepancy between the ECAM Checklist and the more complete procedure in their Flight Manual as far as utilizing the PTU to extend the landing gear. They declared an emergency; landed safely and was towed to a gate after a 30 minute delay.
Narrative: During cruise; we got a Green Hyd Engine 1 low presure ECAM. All other systems were normal. We accomplished the procedure and then contacted dispatch and Maintenance Control. There appeared to be a discrepancy between the ECAM checklist and the AOM checklist that we referenced after accomplishing the ECAM. As I recall; the ECAM directed us to restore the PTU [Power Transfer Unit] in order to lower the landing gear. The AOM gave no such direction. Since our Green system quantity was almost zero; turning the PTU back on didn't seem to make sense. Maintenance Control agreed; and we left the PTU off for the rest of the flight. I briefed the Flight Attendents; declared an emergency and we landed in ZZZ. Because we had to gravity extend the landing gear; we had no nose wheel steering or normal brakes but backup systems worked as advertised. We did; however; have to wait for approximately 20 minutes to get towed off the runway.
Data retrieved from NASA's ASRS site as of July 2013 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.