# SDR CA130523002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 2013
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Cessna 401B
- Registry model: [Cessna 401B](https://openairdocs.org/model/cessna-401b) (OpenAirDocs)
- Aircraft time: 15,766 hours
- Engine: Cont TSIO520EB
- Propeller: Mcauly 3AF32C*
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Sprocket
- Part number: 086150071
- Condition: Broken
- Location: Flap Actuator
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA130523002

## Discrepancy

(CAN) DURING THE ACFT RUNUP, THE PILOT SELECTED FLAPS DOWN.  AT 30 DEGREE OF FLAP DOWN POSITION, A NOISE WAS HEARD AND THE FLAPS STOPPED.  THE ACFT TAXIED BACK TO THE RAMP.  AFTER INSPECTION, THE RT CONTROL SPROCKET, PN 0861500-71 ON THE FLAP ACTUATOR WAS FOUND BROKEN.  THE BREAK WAS WHERE THE ATTACHING PIN, PN 0861500-70 GOES THROUGH THE SPROCKET AND ACTUATOR DRIVE SHAFT ASSY.

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