What was found
APU CT5ATP TREND DATA SHOWS EGT TO BE NOT STABLE INPUT ERRORS ARE SUSPECT. ACFT GROUNDED. REPLACED APU INLET TEMPERATURE SENSOR. OP CHECK GOOD IAW AMM 49-61-31-400-801.
- Difficulty date
- December 3, 2013
- Submitted
- December 5, 2013
- Operation
- Air carrier
- Aircraft
- N579AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35187
- Aircraft time
- 29,589 hours, 7,733 cycles
- System (JASC)
- 4960 · APU Controls
- Part
- Sensor
- Part number
- MS280341
- Condition
- Malfunctioned
- Location
- Apu
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.