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Emb-505 flight crew reported the loss of temperature control led to a diversion where maintenance found corroded temperature modulating valves.
| Attributes | |
| ACN | 1614309 |
| Time | |
| Date | 201901 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Make Model Name | EMB-505 / Phenom 300 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Aircraft Auto Temperature System |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 5000 Flight Crew Type 500 |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Other / Unknown Inflight Event / Encounter Weather / Turbulence |
Narrative:
Extreme cold cockpit temperatures were experienced enroute from ZZZ to ZZZ1 airport with two crew and four passengers on board.the crew begin to notice cold cockpit temperatures 30 minutes after departure from ZZZ airport. The crew attempted to warm the cockpit temperature by increasing the controller knob. This had no effect on the actual cockpit temp; a further increase to the temp controller was made. This induced the duct 2 overtemp cas. The crew followed the checklist for the corresponding cas massage and the cas message extinguished. Yet the cockpit temperature continued to decrease. The crew begins to experience adverse effects from the cold temperatures inside the cockpit. Realizing the adverse effects the extreme cold temperatures were having; the crew [notified ATC] and requested an immediate emergency descent to a lower altitude and requested a divert to ZZZ2 airport.the descent; approach and landing at ZZZ2 was safe and uneventful. Heavily corroded tmvs (temperature modulating valves) were found after maintenance was performed the following day.
Original NASA ASRS Text
Title: EMB-505 flight crew reported the loss of temperature control led to a diversion where maintenance found corroded Temperature Modulating Valves.
Narrative: Extreme cold cockpit temperatures were experienced enroute from ZZZ to ZZZ1 airport with two crew and four passengers on board.The crew begin to notice cold cockpit temperatures 30 minutes after departure from ZZZ airport. The crew attempted to warm the cockpit temperature by increasing the controller knob. This had no effect on the actual cockpit temp; a further increase to the temp controller was made. This induced the duct 2 OVERTEMP CAS. The crew followed the checklist for the corresponding CAS massage and the CAS message extinguished. Yet the cockpit temperature continued to decrease. The crew begins to experience adverse effects from the cold temperatures inside the cockpit. Realizing the adverse effects the extreme cold temperatures were having; the crew [notified ATC] and requested an immediate emergency descent to a lower altitude and requested a divert to ZZZ2 airport.The descent; approach and landing at ZZZ2 was safe and uneventful. Heavily corroded TMVs (Temperature Modulating Valves) were found after maintenance was performed the following day.
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.