# SDR ASOA99147

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N285AS
- Make and model: Emb EMB-120RT
- Registry model: [EMB EMB-120RT](https://openairdocs.org/model/embraer-emb-120rt) (OpenAirDocs)
- Aircraft serial: 120265
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: Pcu
- Part number: 78249046
- Condition: Inoperative
- Location: Rt Engine
- Part time: 22,692 hours
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASOA99147

## Discrepancy

IN CLIMB-OUT, CREW NOTICED RIGHT NP BEGAN SHOWING OUT OF LIMITS.  NP THEN BEGAN TO SURGE AND FLUCTUATE UP TO APPROXIMATELY 102 PERCENT.  CREW FOLLOWED QRH PROCEDURES, WHICH REQUIRED FEATHERING RIGHT PROPELLER.  CREW DECLARED EMERGENCY, DIVERTED TO AGS, AND LANDED SAFELY.  MAINTENANCE REMOVED AND REPLACED RIGHT ENGINE PCU IAW EMB120 MM 61-00-00.  LEAK AND OPERATIONAL CHECKS WERE GOOD ON GROUND RUNS.  AIRCRAFT RETURNED TO SERVICE.  (M)

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