- Difficulty date
- October 3, 2018
- Submitted
- October 4, 2018
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35189
- Aircraft time
- 41,874 hours, 12,782 cycles
- Part
- Sensor
- Part number
- 38762983
- Part serial
- 1616222108185
- Condition
- Failed
- Location
- Apu
- Part time
- 1,764 hours, 3,382 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CDU APU BITE TEST OIL QTY SHOWS UNKNOWN APU BITE SHOWS MAINT MESSAGE 49-94304 OIL LEVEL SENSOR SHOWS CIRCUIT FAILURE. GROUNDED - YES. ACCOMPLISHED FIM TASK 49-90 TASK 811 AND DETERMINED OIL LEVEL SENSOR FAILURE. REPLACED SENSOR. CLEARED FAULTS. APU OIL LEVEL READS. FULL. SENSOR LEAK CHECKS GOOD. APU BITE TEST GOOD. REF AMM TASK 49-94-11-000-801, 49-94-11-400-801 & 49-60 TASK 801.