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Flight crew reported multiple pack issues threatening to destabilize cabin pressurization. Crew was able to stabilize the issues and continue to its destination.
| Attributes | |
| ACN | 1396134 |
| Time | |
| Date | 201610 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Air Conditioning and Pressurization Pack |
| Person 1 | |
| Function | First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
1. EICAS amber 'pack3; pack2; pack1'2. Donned oxygen; established communication3. Complied with QRH to line 74. Crew system knowledge and CRM decision to stop at line 7 of QRH.5. Cabin pressure of 4;200 feet; duct pressure of 34 psi; differential pressure 8.6 psi; cabin rate of '0' zero.6. Decision was made to contact dispatch via SATCOM7. Dispatch placed maintenance control and another captain on satcom conference call.8. After review of existing conditions and recommendation by the other captain to turn off pack one; rest pack; set system a; and B and reset pack one both times. Reviewed EICAS primary; status page; and environmental control system (ecs) system page; cancel and recall display select panel (dsp) review of EICAS. The other captain recommended packs select high flow.9. Through use of CRM; decision was made by crew and agreement with maintenance control; the other captain and dispatch to continue to destination with consideration of the following factors. 1) increased fuel burn associated with packs high flow. 2) possible need to divert at 10;000 feet due to loss of pressurization. 3) need for equal time point with need for suitable weather at divert airports.crew also used performance in flight manual in QRH; to determine adequate fuel for diversion at low altitude was available. Landed safely with 15.4 kilos of fuel on board at destination.
Original NASA ASRS Text
Title: Flight crew reported multiple pack issues threatening to destabilize cabin pressurization. Crew was able to stabilize the issues and continue to its destination.
Narrative: 1. EICAS amber 'pack3; pack2; pack1'2. Donned oxygen; established communication3. Complied with QRH to line 74. Crew system knowledge and CRM decision to stop at line 7 of QRH.5. Cabin pressure of 4;200 feet; duct pressure of 34 PSI; differential pressure 8.6 PSI; cabin rate of '0' zero.6. Decision was made to contact Dispatch via SATCOM7. Dispatch placed Maintenance Control and another Captain on SATCOM conference call.8. After review of existing conditions and recommendation by the other Captain to turn off pack one; rest pack; set system A; and B and reset pack one both times. Reviewed EICAS primary; status page; and Environmental Control System (ECS) system page; cancel and recall Display Select Panel (DSP) review of EICAS. The other Captain recommended packs select high flow.9. Through use of CRM; decision was made by crew and agreement with Maintenance Control; the other Captain and Dispatch to continue to destination with consideration of the following factors. 1) Increased fuel burn associated with packs high flow. 2) Possible need to divert at 10;000 feet due to loss of pressurization. 3) Need for equal time point with need for suitable weather at divert airports.Crew also used performance in flight manual in QRH; to determine adequate fuel for diversion at low altitude was available. Landed safely with 15.4 kilos of fuel on board at destination.
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.