Service difficulty report · Warning System · Boeing 737990ER
FAA SDR system
- Difficulty date
- September 29, 2018
- Submitted
- October 3, 2018
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44108
- Aircraft time
- 11,886 hours, 3,915 cycles
- Part
- Warning System
- Condition
- Activated
- Location
- Cockpit
- Part time
- 11,927 hours, 3,930 cycles
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CLIMB FL 230 "L" "SIDE" WINDOW OVERHEAT LT ILLUMINATES, AFTER 5 MIN COOLING PER QRH LT REMAINED ILLUMINATED. GROUNDED - YES. VERIFIED DISCREPANCY - ACCOMPLISHED FIM 30-41 TASK 811. FOUND HEATING ELEMENT READ 57.8 OHMS. WINDOW SENSOR READS 307 OHMS. AT 180 DEG F READS 347. PRECAUTIONARY REPLACED WHCU. REF WD 30-41-12. RMVD AND INSTALLED NEW WHCU M322. REF 30-41-11.