What was found
APU DRAIN MAST HAS EXTENSIVE CRACKING AROUND ROOT FILLET AND DELAMINATION OF THE LEADING EDGE. GROUNDED - YES. REMOVED AND REPLACED DAMAGED APU DRAIN MAST PER REF AMM 28-25-07-020-801 AND 28-25-07-420-801.
- Difficulty date
- January 1, 2017
- Submitted
- January 4, 2017
- Operation
- Air carrier
- Aircraft
- N557AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35176
- Aircraft time
- 40,349 hours, 11,892 cycles
- System (JASC)
- 2820 · Aircraft Fuel Distribution System
- Part
- Drain Mast
- Part number
- 346A28015
- Condition
- Cracked
- Location
- Fuel System
- 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.