# SDR 9WGA2022020235601

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2022
- Submitted: February 3, 2022
- Operation: Air carrier
- Aircraft: [N356KD](https://openairdocs.org/aircraft/N356KD), registered now
- Make and model: Boeing 747446F
- Aircraft serial: 26356
- Aircraft time: 80,290 hours, 16,469 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Bracket
- Condition: Broken
- Location: Nr 4 Engine
- Part time: 33,827 hours, 10,620 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9WGA2022020235601

## Discrepancy

AIR RETURN BACK TO LAX DUE TO ENGINE 4 SURGE. ENGINE 4 SURGED MULTIPLE TIMES DURING CRUISE, SURGE WAS INTERMITTENT. PERFORMED SURGE CHECKLIST.  REMOVED AND REPLACED VSV ACTUATOR LEVER PIVOT BRACKET & BOLT/STUD AS PER AMM 72-36-00. OPS CHECK GOOD.

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