What was found
WHILE OPERATING PACKS, APU PRESSURE HAD BEEN NORMAL THEN DROPPED TO 15 PSI WITH NO SWITCH MANIPULATION. ACFT GROUNDED. REPLACED APU WIRE HARNESS AND OPS NORMAL IAW AMM 49-11-01.
- Difficulty date
- August 6, 2014
- Submitted
- August 7, 2014
- Operation
- Air carrier
- Aircraft
- N559AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35178
- Aircraft time
- 29,321 hours, 8,765 cycles
- System (JASC)
- 4997 · APU System Wiring
- Part
- Wire Harness
- Part number
- 38884492
- Condition
- Failed
- Location
- Apu
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.