What was found
FLT CREW REPORTS NO DUCT PRESSURE FROM APU BLEED. GROUNDED - YES. REMOVED AND REPLACED APU ECU. PERFORMED APU START AND BITE TEST; BOTH GOOD. NO FAULTS. DUCT PRESSURES FROM APU BLEED GOOD. REF B737-800 AMM 49-61-12.
- Difficulty date
- November 29, 2018
- Submitted
- November 30, 2018
- Operation
- Air carrier
- Aircraft
- N594AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35191
- Aircraft time
- 40,687 hours, 12,247 cycles
- System (JASC)
- 4960 · APU Controls
- Part
- Control Unit
- Part number
- 2118966222
- Part serial
- 50F0432
- Condition
- Failed
- Location
- Apu
- Part time
- 63,636 hours, 24,584 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.