- Difficulty date
- July 30, 2021
- Submitted
- August 3, 2021
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35189
- Aircraft time
- 49,798 hours, 15,034 cycles
- Part
- Exciter
- Part number
- 38880587
- Part serial
- 160312
- Condition
- Shorted
- Location
- Apu
- Part time
- 5,069 hours, 8,396 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.
What was found
APU FAULT LIGHT ILLUMINATED SHOWS FAULT CODE 49-41180 IGNITION UNIT CIRCUIT SHOWS HIGH CURRENT. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 49-40 TASK 804, REMOVED AND REPLACED IGNITION UNIT REF B737-800 AMM 49-41-31 AND AS PRECAUTION REMOVED AND REPLACED IGNITER PLUG REF AMM 49-41-51. APU STARTS NORMALLY.