What was found
APU FAILED 2 START ATTEMPTS. FAULT LIGHT ILLUMINATED WITH EGT @ 900C AND APU MAKING RATTLING NOISE. GROUNDED - YES. REMOVED AND REPLACED STARTER CONVERTER UNIT. REF B737-800 AMM 49-41-61. OPS CHECK GOOD.
- Difficulty date
- November 9, 2019
- Submitted
- November 14, 2019
- Operation
- Air carrier
- Aircraft
- N508AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35691
- Aircraft time
- 43,096 hours, 12,848 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Converter
- Part number
- 1152466250
- Part serial
- 115246601703
- Condition
- Failed
- Location
- Apu Start
- Part time
- 47,543 hours, 14,103 cycles
- 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.