What was found
NR 1 FUEL FILTER BYPASS LIGHT ILLUMINATED. GROUNDED - YES. PERFORMED FIM 73-05 TASK 801 ON #1 ENGINE. REMOVED AND REPLACED FUEL DIFFERENTIAL PRESSURE SWITCH REF AMM 73-34-01. OPS & LEAK CHECK GOOD.
- Difficulty date
- October 10, 2018
- Submitted
- October 12, 2018
- Operation
- Air carrier
- Aircraft
- N478AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44105
- Aircraft time
- 13,068 hours, 4,404 cycles
- System (JASC)
- 7334 · Fuel Pressure Sensor
- Part
- Pressure Switch
- Part number
- QA07995
- Part serial
- YY1111465
- Condition
- Failed
- Location
- Nr 1 Engine
- Part time
- 13,080 hours, 4,409 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.