# SDR UIEA2017090301592

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2017
- Submitted: September 5, 2017
- Operation: Air carrier
- Aircraft: [N1229A](https://openairdocs.org/aircraft/N1229A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 28884
- Aircraft time: 66,499 hours, 14,141 cycles
- Engine: Ge CF680C2B6F
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Unknown
- Condition: Vibration
- Location: Unknown Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2017090301592

## Discrepancy

DURING DESCENT, WHEN ACFT HAS LEVELED AND AUTOTHROTTLES ARE ADVANCED FROM IDLE,  THE ACFT EXPERIENCES AN AIRFRAME SHAKING & BOOM.  UNABLE TO CONFIRM WHICH ENGINE, HOWEVER IT HAPPENED 3 TIMES DURING DESCENT.  PERFORMED TROUBLSHOOTING IAW FIM 71-05 F/T 808,  NO DEFECTS NOTED. INSPECTED THE ENGINE, NO DEFECTS NOTED.  PERFORMED AN AIRFRAME VIBRATION CONDITION INSPECTION.  NO DEFECTS NOTED,  RAN BOTH ENGINES TO 70 PERCENT N1,  NO FAULTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.