06/29/21
Message Overview:
Message Name:
PILOT FLOOR HEATERS UNSERVICEABLE
| Message Code: | 251OBS003 |
| Effectivity: | All |
| System: | Flight Crew Seats |
| System Description: | 25-11-00 |
| Schematic Diagram: | 25-13-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 25-13-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
Message Description:
The Floor Heater does not operate. The result is that the air temperature is colder at the Flight Crew Floor.
Possible Causes:
- Secondary Power Distribution Assembly (SPDA) 1 (A13)
- Pilot Floor Heater 1 (HR4)
- Pilot Floor Heater 2 (HR5)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Notice To Operators (NTO): None
Flight Operation Notifications Manual (FONM): None
NOTE: No troubleshooting is necessary when no ELT/NAV interface unit is installed.
Quick Links:
| Removal of the Flight Crew Floor-Heaters | AMM 25-13-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Flight Crew Floor-Heaters | AMM 25-13-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Perform wiring check between SPDA 1 and pilot floor heaters.
From To Result HR4J1-A A13P2-H HR4J1-B GS306 HR5J1-A A13P2-H HR5J1-B GS306 - If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Replace defective pilot floor heater.
- Do close out.