# SDR 2020FA0000517

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2020
- Submitted: December 1, 2020
- Operation: General aviation
- Aircraft: [N2060U](https://openairdocs.org/aircraft/N2060U), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S9557
- Aircraft time: 9,590 hours
- System (JASC): [3710 · Vacuum Distribution System](https://openairdocs.org/jasc/3710)
- Part: Pump
- Condition: Failed
- Location: Vacuum Sys
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2020FA0000517

## Discrepancy

PILOT STATEMENT:  ON OCTOBER 3RD, I WAS DOING TRAFFIC PATTERNS AT KTOA.  WHEN I START THE ENGINE, I NOTICED THAT THE VACUUM PUMP WAS READING LOW (THE INDICATOR WAS POINTING AT THE BOTTOM), BUT IT WASN'T FAILED.  I ASSUMED IT'S DUE TO LOW RPM, SO I DECIDED TO CONTINUE TO TAXI TO THE RUN-UP AREA.  WHEN I PUSHED THE THROTTLE TO 1800 RPM FOR THE PRE-TAKEOFF CHECKLIST, THE VACUUM PUMP INDICATOR WAS WITHIN THE GREEN RANGE, EVERYTHING ELSE WAS READING NORMAL.  THUS, I APPROACH THE HOLD SHORT LINE AND WAIT FOR TAKE-OFF CLEARANCE.  HOWEVER, WHEN I PUSH THE THROTTLE TO 2700RPM, THE VACUUM PUMP INDICATOR SPIKES ALL THE WAY TO THE TOP.  I IMMEDIATELY ABORTED THE TAKE-OFF AND HEADED BACK TO PSA.  I TALKED TO MY INSTRUCTOR AND ANOTHER INSTRUCTOR AFTER, AND THEY SAID IT SHOULD BE FINE TO FLY.  SO, I GOT BACK INTO N2060U AND DID ONE SOLO TRAFFIC PATTERN AT KTOA.  10/25/2020 LEFT VACUUM PUMP REPLACED WITH RAPCO PN215CC.

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