# SDR SWAA983161

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N690SW
- Make and model: Boeing 737-3G7
- Registry model: [Boeing 737-3G7](https://openairdocs.org/model/boeing-737-3g7) (OpenAirDocs)
- Aircraft serial: 23783
- Engine: Ge CFM563B1
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Malfunctioned
- Location: Nr 2
- Stage of operation: CL
- Nature of condition: R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA983161

## Discrepancy

ON CLIMBOUT PASSING 20,000 FT, A/C YAWED RIGHT AND GRINDING NOISE WAS FELT THROUGH CONTROLS.  NR 2 N1 + N2 FLUCTUATED APPROX 5 PERCENT WITH GRINDING NOISE.  POWER AT CLIMB (APPROX 90 PERCENT) EGT + FUEL FLOW NORMAL.  AFT F/A REPORTED BANGING NOISE IN CABIN.  NR 2 ENG     PARAMETERS NORMAL ON APPROACH.  FOUND EVIDENCE OF SHINGLED BLADES.  INSP'D INLET, EXHAUST VBV, VSV, OIL FILTER AND CHIP DETECTORS; NO FAULTS NOTED.  RAN ENG, PARAMETERS WITHIN M/M LIMITS.  ENG OPS CHECK GOOD.

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