What was found
APU SWITCH SHOWS INCORRECT CONFIGURATION "OFF" WHEN IT SHOULD BE "VALVE". REMOVED AND REPLACED APU BLEED KORRY SWITCH IAW SWPM 20-84-13. OPS CHECK GOOD. VALVE INDICATION PRESENT.
- Difficulty date
- May 21, 2021
- Submitted
- May 28, 2021
- Operation
- Air carrier
- Aircraft
- N1997A
- Make and model
- Boeing 76733A
- Aircraft serial
- 27310
- Aircraft time
- 100,300 hours, 20,891 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Switch
- Part number
- 233T3100319
- Condition
- Failed
- Location
- Apu
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.