# SDR ASAA2020121833733

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2020
- Submitted: December 23, 2020
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 24,228 hours, 7,813 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7220 · Turbine Engine Air Inlet Section](https://openairdocs.org/jasc/7220)
- Part: Blade
- Condition: Damaged
- Location: Nr 1 Engine
- 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/ASAA2020121833733

## Discrepancy

WHILE ACCOMPLISHING FAN BLADE LUBE ON NR 1 ENGINE T/C 78472010, FOUND MOLYDAGE COATING MISSING UP TO 100% WITH NO WEAR TO SHIM BASE MATERIAL.  GROUNDED-YES.  PER  B737-900 AMM 72-21-02-200-801-F00 2L(1)(B) 3): ALL SHIMS ON NR 1 ENGINE MUST BE REPLACED WITHIN 1850 CYCLES.

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