What was found
APU DRAIN MAST CRACKED ON AFT EDGE. ACFT GROUNDED. VERIFIED 0.80 INCH CRACK W/ HFEC MM NDT- PART 6 51-0-0 NR 23. REMOVED APU DRAIN MAST IAW AMM 28-25-07-020-801. INSTALLED APU DRAIN MAST IAW AMM 28-25-07-420-801.
- Difficulty date
- December 15, 2016
- Submitted
- December 19, 2016
- Operation
- Air carrier
- Aircraft
- N518AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35693
- Aircraft time
- 30,389 hours, 8,997 cycles
- System (JASC)
- 4930 · APU Engine Fuel and Control
- Part
- Drain
- Part number
- 346A28015
- Condition
- Cracked
- Location
- Apu
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.