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Emb 505 flight crew reported an overheat warning for both ducts without a published procedure in the QRH to addressed the situation.
| Attributes | |
| ACN | 1484875 |
| Time | |
| Date | 201709 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | EMB-505 / Phenom 300 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Component | |
| Aircraft Component | Pneumatic System - Indicating and Warning |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
We were starting to level at FL360 when the cass announced 'duct 2 overtemp'. Following the checklist required us to go to ecs 1. Then we got 'duct 1 overtemp'. You could deduct that there is a possibility of fire. We have later discovered that it may have been a ram air mixing valve error that could have caused both to show failure indications. When this happens it becomes extremely hot in the cockpit (130 degrees estimated) because you cannot control the temperature any longer. We landed without incident and when I reached 11000 ft I turned off both bleed valves which extinguished the annunciations at around 6000ft.I would suggest that at least a memo on dual duct failure could be devised ... I had a very good first officer (first officer) and we were able to keep cool during the event but this could lead to confusion as to whether we have a fire or not.
Original NASA ASRS Text
Title: EMB 505 flight crew reported an overheat warning for both ducts without a published procedure in the QRH to addressed the situation.
Narrative: We were starting to level at FL360 when the Cass announced 'Duct 2 Overtemp'. Following the checklist required us to go to ECS 1. Then we got 'Duct 1 Overtemp'. You could deduct that there is a possibility of fire. We have later discovered that it may have been a Ram Air Mixing Valve error that could have caused both to show failure indications. When this happens it becomes extremely hot in the cockpit (130 degrees estimated) because you cannot control the temperature any longer. We landed without incident and when I reached 11000 ft I turned off both bleed valves which extinguished the annunciations at around 6000ft.I would suggest that at least a memo on dual duct failure could be devised ... I had a very good First Officer (FO) and we were able to keep cool during the event but this could lead to confusion as to whether we have a fire or not.
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.