What was found
WHILE ACCOMPLISHING T/C 78472010 #1 ENGINE FOUND HUB RETAINING RING FRETTING ON MATING SURFACE REQUIRES REPLACEMENT. GROUNDED - YES. RETAINING RING REMOVED AN REPLACED PER T/C 78472010.
- Difficulty date
- July 6, 2019
- Submitted
- July 9, 2019
- Operation
- Air carrier
- Aircraft
- N486AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44107
- Aircraft time
- 15,120 hours, 4,942 cycles
- Engine
- Cfmint CFM567B27E
- System (JASC)
- 7220 · Turbine Engine Air Inlet Section
- Part
- Retaining Ring
- Part number
- 3401604020
- Condition
- Damaged
- Location
- Nr 1 Engine
- 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.