# SDR ASAA2021062218342

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 18, 2021
- Submitted: August 5, 2021
- Operation: Air carrier
- Aircraft: [N428AS](https://openairdocs.org/aircraft/N428AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36353
- Aircraft time: 19,922 hours, 6,315 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7300 · Engine Fuel and Control](https://openairdocs.org/jasc/7300)
- Part: Actuator
- Part number: 1324M12P10
- Part serial: APMVK041
- Condition: Faulted
- Location: Nr 2 Eng Vsv
- Part time: 20,351 hours, 6,450 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/ASAA2021062218342

## Discrepancy

WHILE PERFORMING T/C 78273000 FOUND ENG 2 LONG TIME FAULT 75-10392 THE VSV POSITION SIGNAL IS OUT OF RANGE. GROUNDED - YES. FOUND VSV ACTUATOR CHANNEL A FAILED VERIFIED OPEN CIRCUIT THROUGH T517 PLUG ACTUATOR   PINS 2 AND 3. REF B737-900 FIM 75-31 TASK 803 ITEM F4. REMOVED AND REPLACED THE #2 ENGINE RIGHT VSV ACTUATOR PER B737-900 AMM 75-31-01/401. ACCCOMPLISHED CONNECTION OF THE VSV TO HMU FLEX HOSE INSTALLATION PER AMM 75-31-01-790-801-F00 STEPS 7E.(2).(I).1). AND 2). ALL LEAK AND OPS CHECKS GOOD.

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