# SDR ASAA2017031120124

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2017
- Submitted: April 17, 2017
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 33,233 hours, 10,150 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Actuator
- Part number: 1324M12P10
- Part serial: AMPYP444
- Condition: Failed
- Location: Nr 1 Vsv
- Part time: 12,568 hours, 4,132 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017031120124

## Discrepancy

WHILE PERFORMING MAINTENANCE,  FOUND MAINTENANCE MESSAGE 75-20391, FOR THE VSV POSITION SIGNAL IS OUT OF RANGE. LONG TERM FAULT ON NR 1 ENGINE.  ACFT GROUNDED.   FIM 75-31 TASK 803 ACCOMPLISHED VSV ACTUATOR CHANNEL B (LEFT SIDE) RESISTANCE OUT OF LIMITS. REMOVED AND REPLACED THE LT VSV ACTUATOR IAW AMM 75-31-01-00-801-F00, AND AMM 75-31-01-400-801-F00.

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