# SDR ASAA202001281990

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 2020
- Submitted: January 29, 2020
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 50,395 hours, 15,180 cycles
- Engine: Cfmint CFM567B262
- System (JASC): [7220 · Turbine Engine Air Inlet Section](https://openairdocs.org/jasc/7220)
- Part: Nut Plate
- Condition: Corroded
- Location: Lt Accous Panel
- Part time: 35,075 hours, 10,208 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA202001281990

## Discrepancy

NR 1 ENG INLET AND FAN BLADES-DETAILED INSP FOUND 17 EACH NUTPLATES HAVE CORROSION UNDER THEM ON O/B FAN FRAME CASE AT AFT ACOUSTICAL PANEL LOCATION.    GROUNDED - YES.  CONTINUE IN-SERVICE OF 50 CYCLES, NO CRACKS IN ALL NUTPLATES FOUND IAW AMM 72-23-05-700-801-F00 2,F,(H),2. REPAIR MUST BE DONE IN 50 CYCLES. REMOVED AND REPLACED NR 1 ENGINE.

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